Vascular Thoracic Outlet Syndrome

Reliability of a Standardized Ultrasound Protocol for the Diagnosis of Thoracic Outlet Syndrome

Arterial thoracic outlet syndrome (aTOS) is a rare condition, but if undiagnosed, it can have serious consequences for affected patients, up to and including limb loss. Ultrasound could be used here as a widely available method for screening, but it is said to have very high investigator dependence. The fact that ultrasound can be used safely for diagnostic purposes has already been demonstrated. The aim of this study was to evaluate the repeatability of a standardized examination for the diagnosis of aTOS.We recruited inpatients with high-grade suspected arterial thoracic outlet syndrome who were evaluated for invasive therapy at our TOS center. Routine diagnostics were performed according to clinic standards. In addition, 2 sonographers, one highly experienced and one less experienced, performed ultrasound diagnosis according to a standardized protocol. Image acquisition and interpretation were performed independently, and sonographers were mutually blinded. For analysis, the experienced sonographer served as a reference. Agreement between assessors was analyzed using concordance analysis.51 consecutive patients (67% female) aged 39.3±13.0 years were included within 11 months. The standardized ultrasound protocol could be performed in all patients. The prevalence of TOS was high (79.4%; CI: 71.4-87.3%) in our cohort. Ultrasound inter-rater agreement using the standardized protocol was very good at 0.820 (CI: 0.624-1.000).Ultrasound diagnosis of TOS using a standardized protocol can be performed effectively and shows a high agreement between 2 sonographers.

Percutaneous balloon venoplasty for symptomatic lead-related venous stenosis

BACKGROUND

Lead-related venous stenosis (LRVS) is common after transvenous lead implantation and generally diagnosed incidentally. Symptomatic LRVS, causing discomfort and swelling, is less common.

OBJECTIVE

We report on the management and outcomes of patients with symptomatic LRVS after percutaneous balloon venoplasty.

METHODS

We included patients with symptomatic LRVS unresponsive to >30 days of anticoagulation who underwent venoplasty at the Hospital of the University of Pennsylvania between 2014 and 2020. Transvenous lead extraction (TLE) was performed first if the lesion could not be crossed with a wire.

RESULTS

Eighteen patients (mean age, 62 ± 10 years; 44% female) underwent 27 venoplasty procedures. Symptoms included arm swelling in 9 (50%), facial/neck swelling in 1 (6%), and both in 8 (44%). Venography revealed LRVS in the axillary/subclavian veins in 10 (56%), the brachiocephalic vein in 6 (33%), and the superior vena cava in 4 (11%). Most patients (83%) required TLE before venoplasty, and only 5 of 18 (28%) remained with leads crossing the stenosed segment. Thirteen patients (72%) had complete symptom resolution, 4 (22%) had partial resolution due to secondary lymphedema, and 1 showed no improvement. Patients with complete resolution had shorter times from symptom onset to intervention (195 vs 690 days; P = .02).

CONCLUSION

LRVS can affect any part of the venous system and may be manifested with swelling of the arm, face/neck, or both. Balloon venoplasty is safe and effective, often requires TLE, and is particularly durable when leads no longer cross the stenosed region. Venoplasty is less effective for secondary lymphedema, highlighting the need for timely intervention.

Trans-Cervical Approach To The Thoracic Outlet Syndrome

Thoracic outlet syndrome is caused by compression of the neurovascular structures within the thoracic outlet leading to a collection of symptoms in the upper limb and shoulder. Identification of the causative factor is essential and thorough clinical examination using specific manoeuvres can aid in the diagnosis of this syndrome. Cervical rib is one of the causes for thoracic outlet syndrome and this manuscript will discuss the thoracic outlet syndrome, cervical rib, incidence, clinical presentation, diagnosis and management including surgical approaches with a focus on transcervical approach.

Current Clinical Concepts: Rehabilitation of Thoracic Outlet Syndrome

Thoracic outlet syndrome (TOS) involves inconsistent symptoms, presenting a challenge for medical providers to diagnose and treat. Thoracic outlet syndrome is defined as a compression injury to the brachial plexus, subclavian artery or vein, or axillary artery or vein occurring between the cervical spine and upper extremity. Three common subcategories are now used for clinical diagnosis: neurogenic, arterial, and venous. Postural position and repetitive motions such as throwing, weightlifting, and manual labor can lead to symptoms. Generally, TOS is considered a diagnosis of exclusion for athletes due to the poor accuracy of clinical testing, including sensitivity and specificity. Thus, determining a definitive diagnosis and reporting injury is difficult. Current literature suggests there is not a gold standard diagnostic test. Rehabilitation has been shown to be a vital component in the recovery process for neurogenic TOS and for arterial TOS and venous TOS in postoperative situations.

Venous thoracic outlet syndrome, as a pitfall for cardiac implantable electronic device implantations

The subclavian vein is typically used in cardiovascular implantable electronic device (CIED) implantations. External stress on the subclavian vein can lead to lead-related complications. There are several causes of this stress, such as frequent upper extremity movements or external injury. Venous thoracic outlet syndrome (TOS) can also become the cause of external lead stress. However, the diagnosis of venous TOS can be challenging because subclavian venography can appear normal at first glance. We present a unique case of a device infection in a patient with venous TOS. A careful observation of the imaging studies is vital for diagnosing venous TOS and a leadless pacemaker implantation could be an alternative therapeutic option.

A rare case of overlapping thoracic outlet syndrome attributed to an anatomical variation in the anterior scalene muscle: Diagnostic challenges and treatment approaches

Mixed thoracic outlet syndrome, which compresses arteries and nerves, is a rare disorder. Mixed thoracic outlet syndrome due to anatomical abnormalities of the anterior scalene muscle is even more sporadic. We report a case of mixed thoracic outlet syndrome in a patient with no history of trauma or vigorous exercise. We reviewed the medical literature, emphasizing the clinical role and the role of diagnostic imaging methods in a sequential approach to this syndrome.

Painful Raynaud's mimics

Raynaud's syndrome is a common finding in many autoimmune conditions. Accurately diagnosing Raynaud's, and differentiating it from mimicking conditions, is imperative in rheumatologic diseases. Raynaud's syndrome and Raynaud's mimickers, especially painful Raynaud's mimickers, can prove a diagnostic challenge for the practicing rheumatologist. Painful Raynaud's mimickers can lead to increased patient stress and unnecessary medical work up; Healthcare providers need to be aware of Raynaud's mimickers when evaluating patient concerns of skin color changes and pain. The present narrative review aims to highlight Raynaud's syndrome, important painful mimickers that may be seen, diagnosis, and updated management recommendations.

A review of arterial thoracic outlet syndrome

Arterial thoracic outlet syndrome (TOS) is a condition in which anatomic abnormalities in the thoracic outlet cause compression of the subclavian or, less commonly, axillary artery. Patients are usually younger and typically have an anatomic abnormality causing the compression. The condition usually goes undiagnosed until patients present with signs of acute or chronic hand or arm ischemia. Workup of this condition includes a thorough history and physical examination; chest x-ray to identify potential anatomic abnormalities; and arterial imaging, such as computed tomographic angiography or duplex to identify arterial abnormalities. Patients will usually require operative intervention, given their symptomatic presentation. Intervention should always include decompression of the thoracic outlet with at least a first-rib resection and any other structures causing external compression. If the artery is identified to have intimal damage, mural thrombus, or is aneurysmal, then arterial reconstruction is warranted. Stenting should be avoided due to external compression. In patients with symptoms of embolization, a combination of embolectomy, lytic catheter placement, and/or therapeutic anticoagulation should be done. Typically, patients have excellent outcomes, with resolution of symptoms and high patency of the bypass graft, although patients with distal embolization may require finger amputation.

Current concepts in clinical features and diagnosis of thoracic outlet syndrome

The diagnosis and clinical features of thoracic outlet syndrome have long confounded clinicians, owing to heterogeneity in symptom presentation and many overlapping competing diagnoses that are "more common." Despite the advent and prevalence of high-resolution imaging, along with the increasing awareness of the syndrome itself, misdiagnoses and untimely diagnoses can result in significant patient morbidity. The authors aimed to summarize the current concepts in the clinical features and diagnosis of thoracic outlet syndrome.

Thoracic outlet syndrome in women

Thoracic outlet syndrome (TOS) is observed more frequently in women, although the exact causes of this sex disparity remain unclear. By investigating the three types of TOS-arterial, neurogenic, and venous-regarding symptoms, diagnosis, and treatment, this article aims to shed light on the current understanding of TOS, focusing on its variations in women.

Systematic review of intermediate and long-term results of thoracic outlet decompression

Thoracic outlet syndrome (TOS) consists of a group of disorders resulting from compression of the neurovascular bundle exiting through the thoracic outlet. TOS can be classified as follows based on the etiology of the pathophysiology: neurogenic TOS, venous TOS, arterial TOS, and mixed TOS. The constellation of symptoms a patient may experience varies, depending on the structures involved. Due to the wide range of etiologies and presenting symptoms, treatments for TOS also differ. Furthermore, most studies focus on the perioperative and short-term outcomes after surgical decompression for TOS. This systematic review aimed to provide a pooled analysis of studies to better understand the intermediate and long-term outcomes of surgical decompression for TOS. We conducted a systematic literature search in the Ovid MEDLINE, Embase, and Google Scholar databases for studies that analyzed long-term outcomes after surgical decompression for TOS. The inclusion period was from January 2015 to May 2023. The primary outcome was postoperative QuickDASH Outcome Measure scores. A total of 16 studies were included in the final analysis. The differences between postoperative and preoperative QuickDASH Outcome Measure scores were calculated, when possible, and there was a mean overall difference of 33.5 points (95% CI, 25.2-41.8; P = .001) after surgical decompression. There was a higher proportion of excellent outcomes reported for patients undergoing intervention for arterial and mixed TOS etiologies, whereas those with venous and neurogenic etiologies had the lowest proportion of excellent outcomes reported. Patients with neurogenic TOS had the highest proportion of poor outcomes reported. In conclusion, surgical decompression for TOS has favorable long-term outcomes, especially in patients with arterial and mixed etiologies.

Validity of Ultrasound for the Diagnosis of Arterial Thoracic Outlet Syndrome

Objective

Thoracic outlet syndrome (TOS) is a rare disorder mostly seen in younger individuals. Although patient wellbeing is relevantly impaired, it often takes a long time before the diagnosis is made. Digital subtraction angiography (DSA) is routinely used despite its radiation exposure, which is a major concern in this young patient population. Moreover, DSA offers limited opportunities for functional assessment. By contrast, ultrasonography is widely accessible without causing radiation exposure and allows for flexible functional assessment. The main goal of the study was to investigate whether ultrasound (US) was a viable alternative to DSA in diagnosing arterial TOS (aTOS).

Methods

Patients, referred to a tertiary centre for evaluation of suspected TOS, were recruited into the study. DSA was routinely performed with the patient's arms both in the raised (abducted) and neutral (adducted) position. Two vascular surgeons and two radiologists assessed the resulting images for the presence of aTOS. Additionally, two examiners performed US according to a standardised protocol. The reference for presence of aTOS was the DSA based interdisciplinary vascular conference consensus. Inter-rater agreement and latent class analysis (LCA) were performed between assessors and diagnostic methods.

Results

Fifty one consecutive patients (two thirds female) aged 39.3 ± 13.0 years were included within 11 months. US agreement was excellent at 0.94 (0.841-0.980), DSA agreement for vascular surgeons was good at 0.779 (0.479-1.000), whereas it was moderate at 0.546 (0.046-1.000) for radiologists. Results suggest that DSA is untenable as the gold standard for aTOS diagnosis. In LCA, US was shown to be a reliable diagnostic tool for the detection of aTOS.

Conclusion

US examination is a valid test for the detection of haemodynamically relevant compression of arteries in the diagnostic work up of aTOS using a standardised protocol. The role of DSA as the gold standard should be reviewed and needs to be reconsidered.

Acute venous problems: Integrating medical, surgical, and interventional treatments

"Acute venous problems" refers to a group of disorders that affect the veins and result in sudden and severe symptoms. They can be classified based on the pathological triggering mechanisms, such as thrombosis and/or mechanical compression, and their consequences, including symptoms, signs, and complications. The management and therapeutic approach depend on the severity of the disease, the location, and the involvement of the vein segment. Although summarizing these conditions can be challenging, the objective of this narrative review was to provide an overview of the most common acute venous problems. This will include an exhaustive yet concise and practical description of each condition. The multidisciplinary approach remains one of the major advantages in dealing with these conditions, maximizing the results and the prevention of complications.

Vascular Problems in Elite Throwing Athletes

There are approximately 880 and 3,600 major league baseball and minor league baseball players who currently are active in their respective leagues, with thousands of players in the collegiate, high school, and little league ranks. Although relatively uncommon, vascular injuries, such as thoracic outlet syndrome, axillary artery compression, quadrilateral space syndrome, and direct vascular trauma, can afflict these players. These career- and limb-threatening injuries can mimic often seen muscular sprains and strains in their early stages with nonspecific symptoms, such as exertional fatigue, which can delay diagnosis with disastrous sequelae, including thrombus propagation, aneurysm rupture, and ischemia from distal embolization. The goal of this review is to discuss the pathophysiology, diagnosis, and treatment of these injuries to increase awareness of sport-related vascular phenomena among the hand and upper-extremity surgery community because these players typically are seen first in the training room or a hand specialist's office.

Anatomy and Pathogenesis of Vascular Thoracic Outlet Syndrome

The current literature review article describes the anatomy and pathogenesis of the vascular nature of thoracic outlet syndrome (TOS), as well as gathers the latest and most important information concerning its diagnostic methods and treatment. This syndrome's subcategory includes the venous and the arterial. Data for this review was accumulated through the PubMed database in which only scientific studies published in the last decade (2012-2022) were searched. PubMed offered 347 results, of which 23 were judged suitable and used. Non-invasive methods both for the diagnosis and the treatment of vascular TOS are gaining ground. Medicine, at this point, finds itself on the verge of slowly putting aside the previous invasive gold-standard methods, to be used only in the most urgent situations. The vascular thoracic outlet condition is a rare form of TOS but is also the most trouble-causing one and the deadliest. Fortunately, it can be more efficiently managed because of the current medical innovations. However, further research is needed to establish their already confirmed effectiveness, so they can be even more widely trusted and used.

Modern Treatment of Neurogenic Thoracic Outlet Syndrome: Pathoanatomy, Diagnosis, and Arthroscopic Surgical Technique

Compressive pathology in the supraclavicular and infraclavicular fossae is broadly termed "thoracic outlet syndrome," with the large majority being neurogenic in nature. These are challenging conditions for patients and physicians and require robust knowledge of thoracic outlet anatomy and scapulothoracic kinematics to elucidate neurogenic versus vascular disorders. The combination of repetitive overhead activity and scapular dyskinesia leads to contracture of the scalene muscles, subclavius, and pectoralis minor, creating a chronically distalized and protracted scapular posture. This decreases the volume of the scalene triangle, costoclavicular space, and retropectoralis minor space, with resultant compression of the brachial plexus causing neurogenic thoracic outlet syndrome. This pathologic cascade leading to neurogenic thoracic outlet syndrome is termed pectoralis minor syndrome when primary symptoms localize to the infraclavicular area. Making the correct diagnosis is challenging and requires the combination of complete history, physical examination, advanced imaging, and ultrasound-guided injections. Most patients improve with nonsurgical treatment incorporating pectoralis minor stretching and periscapular and postural retraining. Surgical decompression of the thoracic outlet is reserved for compliant patients who fail nonsurgical management and respond favorably to targeted injections. In addition to prior exclusively open procedures with supraclavicular, infraclavicular, and/or transaxillary approaches, new minimally invasive and targeted endoscopic techniques have been developed over the past decade. They involve the endoscopic release of the pectoralis minor tendon, with additional suprascapular nerve release, brachial plexus neurolysis, and subclavius and interscalene release depending on the preoperative work-up.

Excellent results seen with both transaxillary and infraclavicular approaches to first rib resection in patients with subclavian vein thrombosis

BACKGROUND

Venous thoracic outlet syndrome (VTOS) is a debilitating condition with several well-documented treatment paradigms. We reviewed the outcomes from a large academic institution of patients who had undergone transaxillary first rib resection with delayed venography (TA) or infraclavicular first rib and subclavius muscle resection with concomitant venography (ICV) for VTOS with subclavian vein thrombosis.

METHODS

We performed a retrospective review of the medical records of all patients who had undergone first rib resection and scalenectomy for VTOS with subclavian vein thrombosis at a single academic institution. The demographics, presentation, operative records, and outcomes were collected. Descriptive statistics were used to compare the two groups.

RESULTS

A total of 73 patients had undergone first rib resection for VTOS during the study period. Of the 73 patients, 36 (49%) had presented with thrombosis of the subclavian vein and were included in the present review. Of the 36 patients, 26 (72%) had undergone TA and 10 (28%) had undergone ICV. No significant differences were seen between the two groups in female gender (54% vs 50%; P = 1.00) or age (28.7 years vs 29.5 years; P = .88). A higher percentage of the ICV group had undergone preoperative thrombolysis (70% vs 27%; P = .02). All the patients in the ICV group had undergone intraoperative balloon venoplasty at resection. The mean time from thrombosis to resection was 2.3 months. All of the TA group had undergone venography at 2 weeks postoperatively. Venography had revealed 15 stenotic veins requiring venoplasty, 8 widely patent veins, 1 acutely thrombosed vein, and 3 chronically occluded veins. The time from initial thrombosis to surgical intervention was 10 months for the patent group, 6 months for the stenotic group, and 4 months for the occluded group. In the TA group, 19% of the patients had required chest tube placement intraoperatively for pneumothorax. In the ICV group, complications included postoperative hematoma (n = 1), wound infection (n = 1), and hemothorax (n = 1). The mean length of stay was 1.04 days for the TA group and 2.00 days for the ICV group (P < .0001). The mean follow-up was 10.4 months and 15.8 months for the TA and ICV groups, respectively. No mortalities were reported. No differences in the vein patency rates were seen between the two groups at follow-up (TA, 93%; vs ICV, 100%; P = 1.00). All the patients were asymptomatic at follow-up.

CONCLUSIONS

The outcomes for the patients who had undergone TA or ICV for subclavian vein thrombosis were excellent with no mortality and few complications. The subclavian vein patency rates were high, and all the patients were asymptomatic at follow-up.

Endovascular Management of Two Uncommon Cases of Acute Upper Limb Ischemia in Young

Acute upper limb ischemia accounts for less than 5% of all cases of limb ischemia. The etiology in young individuals are usually traumatic. Other non-traumatic causes are rarely seen and here we present two such cases in young, presenting with acute upper limb ischemia. The choice between a surgical or a minimally invasive endovascular approach remains unclear. Endovascular approach to management, although based on expertise, offers good post procedural outcome, comparable to post-surgical outcomes. Here we present two cases of thrombotic occlusion of the upper extremity following trauma and arterial thoracic outlet syndrome respectively managed successfully with endovascular approach.

Subclavian Effort and Upper Limb Thrombosis – a Lesson Learned

Subclavian vein effort and upper limb thrombosis, known as the Paget-Schroetter syndrome (PSS), accounts for 30–40 % of spontaneous upper extremity deep vein thromboses (UEDVTs) and 10–20 % of all upper limb deep vein thromboses (DVTs). As complication of PSS include post-thrombotic syndrome and pulmonary embolism, early recognition and prompt initiation of anticoagulant treatment is crucial in the course of its treatment. PSS is associated with single or repeated physical activity of the upper limb, combined with obstruction of venous outflow resulting from anatomical alterations. A correct diagnosis, based on a range of imaging methods, and prompt initiation of local thrombolytic therapy, surgical decompression of the thoracic outlet (when necessary), and immediate initiation of anticoagulant treatment, aim to effectively restore the patient life quality, preventing post-thrombotic syndrome and recurrent thrombosis.

Medium Term Outcomes of Deep Venous Stenting in the Management of Venous Thoracic Outlet Syndrome

OBJECTIVE

Venous thoracic outlet syndrome (vTOS) is a relatively rare condition associated with significant morbidity. Its management continues to evolve, with increasing use of endovascular adjuncts, such as percutaneous thrombectomy and angioplasty, in addition to first rib resection. The utility of stenting residual venous stenotic lesions is poorly defined within the literature. This study sought to review the medium term patency rates of upper limb deep venous stenting in the management of vTOS.

METHODS

A single centre, retrospective review of patients managed for vTOS with first rib resection followed by upper limb deep venous stenting between January 2012 and February 2021 was conducted. Post-procedural ultrasounds were reviewed to determine stent patency.

RESULTS

Twenty-six patients were included, with 33 stents placed. The median duration of follow up was 50 months. On venous duplex ultrasound at three years post-operatively, primary patency rates were 66%, primary assisted patency rates were 88%, secondary patency rates were 91%, and total occlusion rates were 9%. After stent placement, 80% of patients remained asymptomatic with regard to compression symptoms.

CONCLUSION

Upper limb deep venous stenting is an effective adjunct to surgical decompression in the management of vTOS. Stent medium term patency rates are promising; however, further studies with longer follow up and larger cohorts with multicentre results are required to confirm these early findings.

Thoracic outlet syndrome: a review

Thoracic outlet syndrome (TOS) is a rare condition (1-3 per 100,000) caused by neurovascular compression at the thoracic outlet and presents with arm pain and swelling, arm fatigue, paresthesias, weakness, and discoloration of the hand. TOS can be classified as neurogenic, arterial, or venous based on the compressed structure(s). Patients develop TOS secondary to congenital abnormalities such as cervical ribs or fibrous bands originating from a cervical rib leading to an objectively verifiable form of TOS. However, the diagnosis of TOS is often made in the presence of symptoms with physical examination findings (disputed TOS). TOS is not a diagnosis of exclusion, and there should be evidence for a physical anomaly that can be corrected. In patients with an identifiable narrowing of the thoracic outlet and/or symptoms with a high probability of thoracic outlet neurovascular compression, diagnosis of TOS can be established through history, a physical examination maneuvers, and imaging. Neck trauma or repeated work stress can cause scalene muscle scaring or dislodging of a congenital cervical rib that can compress the brachial plexus. Nonsurgical treatment includes anti-inflammatory medication, weight loss, physical therapy/strengthening exercises, and botulinum toxin injections. The most common surgical treatments include brachial plexus decompression, neurolysis, and scalenotomy with or without first rib resection. Patients undergoing surgical treatment for TOS should be seen postoperatively to begin passive/assisted mobilization of the shoulder. By 8 weeks postoperatively, patients can begin resistance strength training. Surgical treatment complications include injury to the subclavian vessels potentially leading to exsanguination and death, brachial plexus injury, hemothorax, and pneumothorax. In this review, we outline the diagnostic tests and treatment options for TOS to better guide clinicians in recognizing and treating vascular TOS and objectively verifiable forms of neurogenic TOS.

Comparison of duplex ultrasound and hemodynamic assessment with computed tomography angiography in patients with arterial thoracic outlet syndrome

Thoracic outlet syndrome (TOS) presents with a variety of neurovascular symptoms, and its diagnosis cannot be established purely on the basis of clinical assessments. Computed tomography angiography (CTA) is currently the most useful investigative modality for patients with suspected vascular TOS. However, CTA facilities are limited, and CTA itself is an expensive and a resource-intensive technique associated with risks such as radiation exposure and contrast toxicity. Therefore, a screening test to identify the need for CTA may facilitate clinical management of patients with suspected TOS. Data for patients with suspected arterial TOS who underwent duplex ultrasound with arterial hemodynamic assessment (HDA) (pulse-volume recording and Doppler arterial pressure measurement) at King Saud University Medical City Vascular Lab between 2009 and 2018 were collected. The sensitivity, specificity, positive and negative predictive values (NPV), and area under the curve for duplex ultrasound and arm arterial HDA with CTA were reviewed. The data for 49 patients (mean age, 31 ± 14 years) were reviewed, of which 71% were female. The sensitivity, specificity, positive predictive value, and NPV of duplex ultrasound were 86.7%, 49.3%, 26.5%, and 94.6%, respectively. For arm arterial HDA, these values were 73.3%, 78.9%, 42.3%, and 93.3%, respectively. The combination of arm arterial HDA with duplex ultrasound scores yielded sensitivity, specificity, positive predictive value, and NPV of 93.3%, 42.3%, 25.5%, and 96.8%, respectively. The combination of duplex ultrasound with arm arterial HDA showed higher sensitivity and NPV than either test alone. The specificity of arm arterial HDA was significantly higher than that of the other measurements. When suspected, arterial TOS could be ruled out using duplex ultrasound and arm arterial HDA. These 2 investigations may help determine the need for CTA.

Thoracic outlet syndrome: a review for the primary care provider

CONTEXT

Thoracic outlet syndrome (TOS) symptoms are prevalent and often confused with other diagnoses. A PubMed search was undertaken to present a comprehensive article addressing the presentation and treatment for TOS.

OBJECTIVES

This article summarizes what is currently published about TOS, its etiologies, common objective findings, and nonsurgical treatment options.

METHODS

The PubMed database was conducted for the range of May 2020 to September 2021 utilizing TOS-related Medical Subject Headings (MeSH) terms. A Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) systematic literature review was conducted to identify the most common etiologies, the most objective findings, and the most effective nonsurgical treatment options for TOS.

RESULTS

The search identified 1,188 articles. The automated merge feature removed duplicate articles. The remaining 1,078 citations were manually reviewed, with articles published prior to 2010 removed (n=771). Of the remaining 307 articles, duplicate citations not removed by automated means were removed manually (n=3). The other exclusion criteria included: non-English language (n=21); no abstracts available (n=56); and case reports of TOS occurring from complications of fractures, medical or surgical procedures, novel surgical approaches, or abnormal anatomy (n=42). Articles over 5 years old pertaining to therapeutic intervention (mostly surgical) were removed (n=18). Articles pertaining specifically to osteopathic manipulative treatment (OMT) were sparse and all were utilized (n=6). A total of 167 articles remained. The authors added a total of 20 articles that fell outside of the search criteria, as they considered them to be historic in nature with regards to TOS (n=8), were related specifically to OMT (n=4), or were considered sentinel articles relating to specific therapeutic interventions (n=8). A total of 187 articles were utilized in the final preparation of this manuscript. A final search was conducted prior to submission for publication to check for updated articles. Symptoms of hemicranial and/or upper-extremity pain and paresthesias should lead a physician to evaluate for musculoskeletal etiologies that may be contributing to the compression of the brachial plexus. The best initial provocative test to screen for TOS is the upper limb tension test (ULTT) because a negative test suggests against brachial plexus compression. A positive ULTT should be followed up with an elevated arm stress test (EAST) to further support the diagnosis. If TOS is suspected, additional diagnostic testing such as ultrasound, electromyography (EMG), or magnetic resonance imaging/magnetic resonance angiography (MRI/MRA) might be utilized to further distinguish the vascular or neurological etiologies of the symptoms. Initial treatment for neurogenic TOS (nTOS) is often conservative. Data are limited, therefore there is no conclusive evidence that any one treatment method or combination is more effective. Surgery in nTOS is considered for refractory cases only. Anticoagulation and surgical decompression remain the treatment of choice for vascular versions of TOS.

CONCLUSIONS

The most common form of TOS is neurogenic. The most common symptoms are pain and paresthesias of the head, neck, and upper extremities. Diagnosis of nTOS is clinical, and the best screening test is the ULTT. There is no conclusive evidence that any one treatment method is more effective for nTOS, given limitations in the published data. Surgical decompression remains the treatment of choice for vascular forms of TOS.

[Please Don't Forget the Neurogenic Thoracic Outlet Syndrome]

Please Don't Forget the Neurogenic Thoracic Outlet Syndrome Abstract. We report the case of a 52-year-old patient who was treated for years for headaches, pain in the neck and arms, and sweating. Despite various therapeutic approaches there was no improvement in the symptoms. Further investigations showed a bilateral thoracic outlet syndrome in the status after multiple bilateral rib fractures after a fall from a window at the age of 18. After the operation of a bilateral thoracic outlet syndrome, the headache disappeared almost completely and there was no more sweating.

Pediatric Stroke due to Thoracic Outlet Syndrome Treated with Thrombolysis and Thrombectomy: A Case Report

Thoracic outlet syndrome (TOS) is a condition that results from the compression of neurovascular structures as they exit the thorax. Arterial ischemic stroke can occur in TOS due to retrograde embolism from the subclavian artery. We describe a 15-year-old girl who presented with left hemiplegia after 2 weeks of right arm numbness and tingling. Imaging showed an acute ischemic stroke due to a right middle cerebral artery occlusion. She was treated with intravenous tissue plasminogen activator at 1.3 h and mechanical thrombectomy at 2.4 h with successful recanalization. Review of her neck computed tomography angiogram suggested a right subclavian artery aneurysm, and upper-extremity imaging also demonstrated distal thrombosis and fusion of right first and second ribs, which was consistent with thoracic outlet syndrome. Three days later, she underwent a right subclavian artery aneurysm repair, right brachial and ulnar artery thrombectomy, and first rib resection. Three months later, she demonstrated good neurologic recovery. TOS is an uncommon cause of stroke in children, which may be heralded by upper-extremity symptoms. Interventionalists should be aware of the possibility of vascular anomalies in children; however, this finding does not exclude the possibility of acute stroke intervention.

Venous thoracic outlet syndrome: When exercising may be discouraged

Thoracic outlet syndrome results from neurovascular compression at the thoracic outlet. Clinical presentation varies according to the predominantly compressed structure, determining its subtype: neurogenic, venous, or arterial. The neurogenic subtype is the most common, affecting 90% of patients, while the vascular subtype is rarely found in practice. We present two case reports of young patients with upper extremity deep vein thrombosis in the setting of venous thoracic outlet syndrome: one due to an anatomic variant, the second an effort thrombosis due to repeated upper arm exercise. These reports depict uncommon clinical scenarios, which imply significant morbidity if not identified and timely treated.

Recurrent middle cerebral artery stroke caused by arterial thoracic outlet syndrome and coagulopathy

Thoracic outlet syndrome (TOS) is defined as compression of neurovascular components passing the thoracic outlet. While neurologic compression is the most common form, rare cases of arterial comprssion could result in concerning cerebral thromboembolic events. Here we present a 15-year-old female with repeated left hemiparesis and radiologic signs of cerebrovascular accident (CVA) in right middle cerebral artery. Further investigations revealed stenosis of the right subclavian artery, saccular aneurysm, and occlusion of the right brachial artery which suggested the diagnosis of arterial TOS. Based on this report, we present this diagnosis as a rare but important cause of CVA, especially in young patients.

Diagnostic and Therapeutic Management of the Thoracic Outlet Syndrome. Review of the Literature and Report of an Italian Experience

The Thoracic Outlet Syndrome is a clinical potentially disabling condition characterized by a group of upper extremity signs and symptoms due to the compression of the neurovascular bundle passing through the thoracic outlet region. Because of the non-specific nature of signs and symptoms, to the lack of a consensus for the objective diagnosis, and to the wide range of etiologies, the actual figure is still a matter of debate among experts. We aimed to summarize the current evidence about the pathophysiology, the diagnosis and the treatment of the thoracic outlet syndrome, and to report a retrospective analysis on 324 patients followed for 5 years at the Padua University Hospital and at the Naples Fatebenefratelli Hospital in Italy, to verify the effectiveness of a specific rehabilitation program for the syndrome and to evaluate if physical therapy could relieve symptoms in these patients.

Novel Use of Ali Shahab Score as a Diagnostic Tool and Decision of Surgical Management in Scalenus Syndrome: A Case Series

BACKGROUND: Scalenus syndrome is a collection of symptoms as the consequences of nerve and vascular compression within the scalene triangle. However, the entity has long been forgotten in publications and is difficult to recognize. The diagnosis of scalenus syndrome is mainly based on clinical findings. The Ali Shahab score is a new scoring system, generated based on clinical symptoms of scalenus syndrome. AIM: In this study, we presented a case series of scalenus syndrome patients who were diagnosed and decide to be managed surgically based on Ali Shahab score. We also reported post-operative outcomes following scalenectomy in our series. METHODS: This was a case series including patients with scalenus syndrome in Gatot Soebroto Army Hospital, Indonesia, and Siloam Asri Hospital, Indonesia, between 2016 and 2021. The diagnosis of scalenus syndrome was made based on Ali Shahab score with a value of more than 7. All patients were performed scalenectomy to decompress the stenotic subclavian artery and brachial plexus from surrounding fibrotic tissue. Eligible subjects were assessed for sex, side of symptoms, pre-operative and post-operative Ali Shahab score, and post-operative outcome. RESULTS: We included 96 patients with scalenus syndrome in this case series. Most of the included patients were male (59.4%) and experienced scalenus syndrome on the right side (76%). The average pre-operative Ali Shahab score in our series was 7.12 ± 0.48 and the post-operative score was 0.11 ± 0. Regarding post-operative outcomes, more than half of the patients experienced symptoms reduction with 38.5% of patients experiencing complete resolution of symptoms following scalenectomy. CONCLUSION: The application of the Ali Shahab score may be used as a diagnostic tool and decision of surgical management for scalenus syndrome patients. Decompression of the subclavian artery and releasing brachial plexus from surrounding fibrotic tissue can improve clinical symptoms in scalenus syndrome patients.

Paget-Schroetter syndrome in an active young female after unsupervised exercise

INTRODUCTION AND IMPORTANCE

Thoracic outlet syndrome (TOS) is a rare syndrome caused by compression of one of the three neurovascular structures in their passage from the cervical area toward the axilla and proximal arm either at the interscalene triangle, the costoclavicular triangle, or the sub coracoid space. The mainstay of management is nonsurgical; however, surgery may be needed when patients persist with symptoms despite conservative management and when vascular structures are involved. Symptoms are non-specific and require high clinical awareness since this pathology tends to affect otherwise healthy young patients.

CASE PRESENTATION

We present the case of a 45-year-old female without any past medical history. She was active and did plenty of exercises. After a high-intensity routine without any guidance, she presented with acute upper limb swelling with pain. After further examination, a venous thoracic outlet syndrome was identified and treated without complications.

CLINICAL DISCUSSION & CONCLUSION

Venous TOS is a rare pathology associated with high long-term morbidity and disability if left untreated; heightened clinical awareness of the possibility of acute thrombosis obstructing venous return and producing these rare symptoms should lead the medical team to assess the patient further and lead to the appropriate medical and surgical intervention.

Subclavian Artery Flow Dynamics Evaluated by Analytical Intraoperative Indocyanine Green Videoangiography During Surgical Treatment of Thoracic Outlet Syndrome: A Case Series

BACKGROUND

Indocyanine green (ICG) videoangiography is rarely used during the surgical treatment of thoracic outlet syndrome (TOS).

OBJECTIVE

To evaluate subclavian artery (SA) flow dynamics using the analytical ICG videoangiography during TOS surgeries.

METHODS

We examined patients with neurogenic TOS who received surgical treatment and whose SA blood flow at the interscalene space was evaluated using ICG videoangiography equipped with an analytical function (FLOW800). Anterior scalenectomy with or without middle scalenectomy and first rib resection were conducted for decompression of the brachial plexus. ICG videoangiography was performed before and after decompression of the brachial plexus. After acquisition of grayscale and color-coded maps, a region of interest was placed in the SA to obtain time-intensity diagrams. Maximum intensity (MI), rise time (RT), and blood flow index (BFi) were calculated from the diagram, in arbitrary intensity (AI) units. We compared values before and after decompression. Comparisons of the three parameters before and after decompression were assessed statistically using the paired t-tests and Wilcoxon signed-rank test.

RESULTS

We evaluated nine procedures in consecutively presenting patients. The observed mean values of MI, RT, and BFi before decompression were 174.1 ± 61.5 AI, 5.2 ± 1.1 s, and 35.2 ± 13.5 AI/s, respectively, and the observed mean values of MI, RT, and BFi after decompression were 299.3 ± 167.4 AI, 6.6 ± 0.8 s, and 44.6 ± 28.3 AI/s, respectively. These parameters showed higher values after decompression than before decompression, and the increase in MI and RT was statistically significant (P < .05).

CONCLUSION

ICG videoangiography allows semiquantitative evaluation of hemodynamic changes during TOS surgery. A marked decrease in the velocity of SA flow was observed after decompression.

Three-Dimensional High-Resolution Temporal Bone Histopathology Identifies Areas of Vascular Vulnerability in the Inner Ear

OBJECTIVES

Hypothesized causes of vestibular neuritis/labyrinthitis include neuroinflammatory or vascular disorders, yet vascular disorders of the inner ear are poorly understood. Guided by known microvascular diseases of the retina, we developed 2 hypotheses: (1) there exist vascular vulnerabilities of artery channels in cases of hypothetical nerve swelling for the superior, inferior, and vestibulocochlear artery and (2) there are arteriovenous crossings that could compromise vascular flow in disease states.

METHODS

Two fully mounted and stained temporal bones were used to render three-dimensional reconstructions of the labyrinth blood supply. Using these maps, areas of potential vascular compression were quantified in 50 human temporal bones.

RESULTS

Although inner ear arteries and veins mostly travel within their own bony channels, they may be exposed (1) at the entrance into the otic capsule, and (2) where the superior vestibular vein crosses the inferior vestibular artery. At the entry into the otic capsule, the ratio of the soft tissue to total space for the superior vestibular artery was significantly greater than the inferior vestibular artery/cochleovestibular artery (median 44, interquartile range 34-55 vs. 14 [9-17], p < 0.0001).

CONCLUSIONS

Three-dimensional reconstruction of human temporal bone histopathology can guide vascular studies of the human inner ear. Studies of retinal microvascular disease helped identify areas of vascular vulnerability in cases of hypothetical nerve swelling at the entrance into the otic capsule and at an arteriovenous crossing near the saccular macula. These data may help explain patterns of clinical findings in peripheral vestibular lesions.

Specialty Mediated 30-Day Complications in First Rib Resection for Thoracic Outlet Syndrome

BACKGROUND

Thoracic outlet syndrome (TOS) takes on heterogenous upper extremity manifestations depending on whether the artery, vein or brachial plexus is primarily compressed. As a result of these variable vascular and neurogenic symptoms, these patients present to surgeons of various training backgrounds for surgical decompression. Surgeon specialty is known to correlate with outcomes for numerous vascular procedures, but its role in TOS is unclear. In this work we examine the association of surgeon specialty with short-term outcomes following first rib resection (FRRS) for TOS.

METHODS

Using the American College of Surgeons National Surgical Quality Improvement Program database, 3,070 patients were identified who underwent FRRS for TOS between 2006-2017. The primary outcomes of the study were 30-d complications, including postoperative hemorrhage requiring transfusion, wound complications, pneumothorax and deep venous thrombosis. Arterial, venous, and neurogenic TOS were distinguished with ICD-9 and 10 codes while patient characteristics, provider specialty, and postoperative outcomes were classified through a combination of standard National Surgical Quality Improvement Program variables and ICD data.

RESULTS

Most FRRS were performed by vascular surgeons (87.9%), general (6.9%) and thoracic surgeons (4.4%). The relative distribution of vascular TOS between the specialties was not significantly different, with non-vascular surgeons performing an equivalent amount of FRRS for arterial (1.1% versus 2.4%) and venous TOS (8.6% versus 9.1%, both P> 0.05). Patients who underwent FRRS with non-vascular surgeons experienced more frequent perioperative transfusions (3.2% versus 1.2%, P = 0.001) and wound infections (1.9% versus 0.8%, P= 0.04). On multivariable regression, patients undergoing FRRS for venous TOS were more likely to require blood transfusion (odds ratios:3.63, 95% CI 1.43-9.25). Patients operated on by surgeons whose specialty was not among the top three most common specialties performing FRRS had a 40% longer operative time (incidence rate ratios:1.42, 95% CI 1.15-1.74) as well as a significantly increased odds of requiring a transfusion (odds ratios:9.87, 95% CI 2.28-42.68).

CONCLUSIONS

The significantly increased operative times and transfusion requirements associated with specialties who uncommonly perform FRRS suggest the role of surgeon experience and volume in this procedure may play more of a role than specialty training. These data also suggest that vascular TOS carries unique risks that should be kept in mind when performing FRRS.

Robotic-Assisted Thoracoscopic Resection of the First Rib for Vascular Thoracic Outlet Syndrome: The New Gold Standard of Treatment?

In thoracic outlet syndrome (TOS) the narrowing between bony and muscular structures in the region of the thoracic outlet/inlet results in compression of the neurovascular bundle to the upper extremity. Venous compression, resulting in TOS (vTOS) is much more common than a stenosis of the subclavian artery (aTOS) with or without an aneurysm. Traditional open surgical approaches to remove the first rib usually lack good exposure of the entire rib and the neurovascular bundle. Between January 2015 and July 2021, 24 consecutive first rib resections for venous or arterial TOS were performed in 23 patients at our institutions. For our completely portal approach we used two 8mm working ports and one 12/8 mm camera port. Preoperatively, pressurized catheter-based thrombolysis (AngioJet®) was successfully performed in 13 patients with vTOS. Operative time ranged from 71-270 min (median 128.5 min, SD +/- 43.2 min) with no related complications. The chest tube was removed on Day 1 in all patients and the hospital stay after surgery ranged from 1 to 7 days (median 2 days, SD +/- 2.1 days). Stent grafting was performed 5-35 days (mean 14.8 days, SD +/- 11.1) postoperatively in 6 patients. The robotic approach to first rib resection described here allows perfect exposure of the entire rib as well as the neurovascular bundle and is one of the least invasive surgical approaches to date. It helps improve patient outcomes by reducing perioperative morbidity and is a procedure that can be easily adopted by trained robotic thoracic surgeons. In particular, patients with a/vTOS may benefit from careful and meticulous preparation and removal of scar tissue around the vessels.

Arterial Thoracic Outlet Syndrome in a Runner

Thoracic outlet syndrome (TOS) most commonly manifests in overhead athletes (e.g., baseball pitchers, swimmers, weight lifters) due to nerve compression caused by skeletal abnormalities. We present the case of a 43-year-old recreational runner with unilateral upper extremity pain while running. Vascular imaging identified an aberrant subclavian artery origin with positional compression in the absence of cervical bone anomalies confirming arterial TOS. A first rib resection and anterior scalenectomy led to symptom resolution. This case emphasizes the importance of a broad differential and complete workup in non-overhead athletes presenting with symptoms consistent with neurogenic TOS, as vascular interventions may be necessary to prevent future complications.

Surgical treatment of cervical rib-associated arterial thoracic outlet syndrome

The arterial form of thoracic outlet syndrome is rare and is associated with anatomic anomalies, generally a cervical rib. It has a varied range of manifestations. The aim of this article is to describe two cases with different clinical presentations: microembolization and aneurysm. A cervical rib was present in both cases. Diagnosis was made on the basis of history, physical examination, postural maneuvers, and X-rays. Computed tomography angiography provided the anatomic detail necessary to plan surgery. Surgical treatment was performed via supraclavicular access, successfully, in both cases.

Quadrangular Space Syndrome: A Narrative Overview

OBJECTIVE

The purpose of this narrative review of the literature is to provide an overview of quadrangular space syndrome with special attention to its clinical presentation, differential diagnosis, and treatment.

METHODS

A narrative review of the English-language, peer-reviewed literature was performed using the key words "axillary nerve," "quadrangular space," "quadrilateral space," and "posterior humeral circumflex artery." Databases searched were Medline Complete, Cumulative Index to Nursing and Allied Health Literatures, and Index to Chiropractic Literature. The search period was from 1983 through January 2020.

RESULTS

There were 85 articles selected for this review. A summary and overview are provided.

CONCLUSION

Quadrangular space syndrome is an uncommon cause of shoulder pain. Clinicians should consider it as a diagnosis after ruling out more common shoulder conditions and examining other concurrent diseases.

Thoracic Outlet Syndrome: A Narrative Review

Thoracic outlet syndrome comprises a group of disorders that result in compression of the brachial plexus and subclavian vessels exiting the thoracic outlet. Symptoms include pain, paresthesia, pallor, and weakness depending upon the compromised structures. While consensus in diagnostic criteria has not yet been established, a thorough patient history, physical exam, and appropriate imaging studies are helpful in diagnosis. General first-line therapy for thoracic outlet syndrome is a conservative treatment, and may include physical therapy, lifestyle modifications, NSAIDs, and injection therapy of botulinum toxin A or steroids. Patients who have failed conservative therapy are considered for surgical decompression. This article aims to review the epidemiology, etiology, relevant anatomy, clinical presentations, diagnosis, and management of thoracic outlet syndrome.

Contemporary Management of Arterial Thoracic Outlet Syndrome

BACKGROUND

Arterial thoracic outlet syndrome (aTOS) is characterized by compression of the subclavian artery as it exits the thoracic girdle. Chronic and repetitive compression leads to several degrees of arterial wall damage. The treatment is varied and depends on the presentation severity. This study aimed to describe the contemporary experience in managing arterial thoracic outlet syndrome at a large tertiary hospital.

METHODS

We conducted a single-institution retrospective review of aTOS cases from January 2009 to January 2020. Demographic data, clinical presentation, medical images, operative notes, and outcomes were assessed.

RESULTS

Thirteen aTOS cases were identified. The mean age was 43 ± 10 years, and 11 (85%) were women. Both sides were equally affected: right (7 cases, 54%) and left (6 cases, 46%). The most common clinical presentation was arm claudication (7 cases, 54%). Other presentations were: acute arm ischemia, pulsatile neck mass and distal embolization. Cervical ribs were identified by plain X-rays in most cases. All patients were submitted to surgical decompression through the supraclavicular approach. Patients with early disease stages were not submitted to arterial reconstruction and were followed with duplex scan. Arterial reconstruction was done in advanced disease stages (5 cases, 38%): end-to-end anastomosis, interposition graft, and bypass graft. The mean follow-up duration was 32,6 ± 25 months. In all patients, the subclavian artery/graft was patent, and the vascular symptoms were entirely resolved. There were no deaths or amputations.

CONCLUSIONS

Arterial thoracic outlet syndrome has a varied clinical presentation. Cervical ribs are the most common anatomic abnormalities. The diagnosis was based on history, physical examination, and imaging exams. Surgery consisted of supraclavicular decompression, arterial resection, and vascular reconstruction, according to the disease stage. The outcomes were excellent.

Surgical treatment of cervical rib-associated arterial thoracic outlet syndrome

Resumo A forma arterial da síndrome do desfiladeiro torácico é rara e está associada a uma anomalia anatômica, geralmente uma costela cervical. Suas manifestações são muito variadas. Este artigo tem como proposta relatar dois casos de apresentações clínicas distintas: microembolização e aneurisma. Em ambos, uma costela cervical estava presente. O diagnóstico foi realizado através da história, do exame físico, das manobras posturais e das radiografias. A angiotomografia computadorizada proporcionou o detalhe anatômico necessário para o planejamento operatório. O tratamento cirúrgico foi realizado pela abordagem supraclavicular, com sucesso em ambos casos.

Costoclavicular ligament as a novel cause of venous thoracic outlet syndrome: from anatomic study to clinical application

PURPOSE

Venous thoracic outlet syndrome (VTOS) is a compressive disorder of subclavian vein (SCV); we aimed to investigate the role of costoclavicular ligament (CCL) in the pathogenesis of VTOS.

METHODS

A cadaver study was carried out to investigate the presence and morphology of CCL in thoracic outlet regions, as well as its relationship with the SCV. Six formalin-fixed adult cadavers were included, generating 12 dissections of costoclavicular regions (two sides per cadaver). Once CCL was identified, observation and measurement were made of its morphology and dimensions, and its relationship with SCV was studied. To take a step further, a clinical VTOS case was reported to prove the anatomical findings.

RESULTS

Two out of twelve costoclavicular regions (2/12, 16.7%) were found to possess CCLs. Both ligaments were located in the left side of two male cadavers and were closely attached to the lateral aspect of sternoclavicular joint capsules. The lateral fibers of the ligament proceed in a superolateral-to-inferomedial manner, while the medial fibers proceed more vertically. Both ligaments were tightly adherent to the SCV, causing significant compression on the vein. In the clinical case, multiple bunches of CCLs were found to compress the SCV tightly intraoperatively. After removing the ligaments, the patient's symptom kept relief during a follow-up period of 2 years.

CONCLUSION

Our study demonstrated that CCL could be a novel cause of VTOS by severe compression of SCV. Patients diagnosed with this etiology could get less invasive surgical treatment by simply removing the ligament.

ACR Appropriateness Criteria® Thoracic Outlet Syndrome

Thoracic outlet syndrome (TOS) is the clinical entity that occurs with compression of the brachial plexus, subclavian artery, and/or subclavian vein at the superior thoracic outlet. Compression of each of these structures results in characteristic symptoms divided into three variants: neurogenic TOS, venous TOS, and arterial TOS, each arising from the specific structure that is compressed. The constellation of symptoms in each patient may vary, and patients may have more than one symptom simultaneously. Understanding the various anatomic spaces, causes of narrowing, and resulting neurovascular changes is important in choosing and interpreting radiological imaging performed to help diagnose TOS and plan for intervention. This publication has separated imaging appropriateness based on neurogenic, venous, or arterial symptoms, acknowledging that some patients may present with combined symptoms that may require more than one study to fully resolve. Additionally, in the postoperative setting, new symptoms may arise altering the need for specific imaging as compared to preoperative evaluation. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel. The guideline development and revision include an extensive analysis of current medical literature from peer reviewed journals and the application of well-established methodologies (RAND/UCLA Appropriateness Method and Grading of Recommendations Assessment, Development, and Evaluation or GRADE) to rate the appropriateness of imaging and treatment procedures for specific clinical scenarios. In those instances where evidence is lacking or equivocal, expert opinion may supplement the available evidence to recommend imaging or treatment.

Cervical ribs in human early life: morphological variability and first identification as a morbidity criterion in a past population

Despite the medical literature on supernumerary cervical ribs in extant adult samples, little is known about their development and occurrence in early infancy. The documentation of cervical ribs in modern samples of fetuses and neonates is indeed affected by ethical as well as technical limitations. The aim of the present study was to investigate their frequencies and morphological variability in the first known archaeological collection of very young children with this anatomical variant. The study sample comes from the 8B-51 necropolis on the Saï island (Sudan) and dates to the Classic Kerma Period (XVIIIe-XVIe centuries BC). It consists of 64 individuals deceased between 24 weeks of amenorrhoea and 2 years of age. Bilateral or unilateral cervical ribs were found in 27 individuals. A total of 43 cervical ribs were identified, 38 of which are fully preserved. According to these observations, at least 42% of the individuals have unilateral or bilateral cervical ribs, with an average maximum length of < 1 cm. This frequency is very high compared to those observed in contemporary adult samples (up to 3%). First, the comparison of our results with biological and genetic research demonstrating the link between the occurrence of cervical ribs and a reduced chance of survival during infancy allows the first identification of this trait as an indicator of morbidity in an archaeological collection, a morbidity to which a genetic homogeneity or even endogamy could contribute. Second, the number of ribs studied makes it possible to propose a morphological classification based on the general shape and the shape of the articular facets, classification that can be used tos refine the analyses of the trait in future samples.

Thirty-year experience of transaxillary resection of first rib for thoracic outlet syndrome

BACKGROUND

Thoracic outlet syndrome is an important clinical entity, which usually affects young patients and working cohort, causing disability if unrecognized and untreated. Although treatment is commonly conservative, in patients with more severe disease, surgical treatment is often required for decompression. Purpose of this paper was to evaluate the surgical and clinical outcomes of patients who underwent first rib resection through transaxillary approach for thoracic outlet syndrome (TOS) during a period of 30 years.

METHODS

A retrospective study was conducted on a prospectively compiled, computerized database between January 1988 and December 2018 including patients affected by TOS surgically treated in two Italian centers, by the same surgeon. Patients with neurogenic and vascular TOS were included in the present analysis. The surgical approach for TOS decompression was the first rib resection using the Roos' transaxillary approach, with small variations in technique. Outcome measures considered for analysis were primary technical success, 30-day and mean follow-up re-intervention, pneumothorax, nerve injury and symptoms recurrence rates.

RESULTS

One hundred three patients were treated: 89 (86.4%) women and 14 (13.6%) man; median age was 32.6±10.2 years (range 9-53). Prominent symptoms were neurogenic in 60 patients (58.2%), venous in 32 (31.1%), and arterial in 11 (7.76%) patients. In 49 patients (47.5%) with prominent neurogenic symptoms, concomitant symptoms of vascular TOS were also presents. Thirteen (12.6%) patients had cervical rib and sixteen cases (15.5%) had bilateral TOS. Technical success was achieved in all cases, and no other surgical access or secondary approach was necessary. Three patients (2.9%) presented with hand ischemia and also needed an arm vein bypass after rib resection. One (0.9%) intraoperative arterial injury was reported and nerve injury rate was 1.8%. At 30-day re-intervention rate was 0.9%: one patient experienced hemothorax solved by thoracoscopic drainage. Restrict pneumothorax was reported in 42 patients (40.8%) treated through pleural drainage. At mean follow-up of (93±9 months) partial symptoms recurrence was present in 6 patients (5.8%).

CONCLUSIONS

In our experience first rib resection through the transaxillary approach is a safe and feasible procedure associated with an acceptable rate of peri-operative morbidity and satisfactory long-term relief of symptoms.

An overview of the findings of dynamic upper limbs’ arterial and venous duplex in cases of vascular thoracic outlet syndrome

Background

To describe the findings of the dynamic upper limb arterial and venous duplex in the assessment of vascular compression in cases of VTOS. This study was conducted on 58 patients with VTOS; they were evaluated by dynamic duplex examination.

Results

Vascular compression was subdivided into a venous compression that was detected in (84.4%,n = 49), arterial compression that was seen in (1.7%,n = 1), and combined arterial and venous compression that was present in (13.7%,n = 8); bilateral compression was existing in (94.4%,n = 55), compression at the scalene triangle was seen in (1.7%,n = 1), at the costo-clavicular space was seen in (91.3%,n = 53), and at the retro-pectoral space was depicted in (8.6%,n = 5).

Complicated arterial compression was detected in (1.7%,n = 1), whereas venous complications were seen in (6.8%,n = 4).

Conclusion

Dynamic duplex ultrasound offered a simple, noninvasive, and quick technique that can help in the evaluation of the vascular thoracic outlet syndrome without exposure to ionizing radiation or contrast media administration like that in CT; nevertheless, it is done with the patient in the upright position, thus avoiding the high false-negative results associated with the supine position that is used in the CT and MRI studies.

Subclavian artery occlusion after a clavicle fracture

A 44-year-old man with a 9-day-old left displaced midshaft clavicle fracture was initially treated conservatively. The patient experienced an increase of pain with tickling and cold sensation in the left upper extremity. CT angiography showed left subclavian artery occlusion over 3 cm at the level of the fracture. At surgical repair, a subclavian-brachial bypass was constructed and fracture fixation was done with an eight-hole locking compression plate. Follow-up at 6 months showed full range of motion of the left shoulder, an open bypass and fracture consolidation.