PET/CT visualises inflammatory activity of pulmonary artery aneurysms in Behçet disease

Hughes-Stovin syndrome-An important differential diagnosis in patients with suspected chronic thromboembolic pulmonary hypertension : A case report

Hughes-Stovin syndrome (HSS) is a rare vasculitis of unknown etiology. The disease is characterized by pronounced inflammation and damage to the vessel walls, with subsequent widespread vascular thrombosis and the formation of pulmonary artery aneurysms that can lead to fatal hemoptysis. This disorder can be mistaken for other conditions, such as chronic thromboembolic pulmonary disease (CTEPD) without or with pulmonary hypertension at rest (CTEPH).We report the case of a 20-year-old female with HSS, which was misdiagnosed as CTEPH and subsequently treated with anticoagulants, which led to severe hemoptysis and eventually death of the patient. This case highlights the challenges of diagnosing HSS at early stages of the disease.HSS should be considered in young patients with signs of large vessel vasculitis in combination with thrombotic occlusions of pulmonary arteries, with or without aneurysms of the pulmonary arteries, and particularly, if there are no risk factors for thromboembolic disease.

Investigations in systemic vasculitis - The role of imaging

Imaging plays an increasing role for confirming a suspected diagnosis of giant cell arteritis (GCA) or Takayasu arteritis (TAK). Ultrasound, magnetic resonance imaging (MRI), and computed tomography demonstrate a homogeneous, most commonly concentric, arterial wall thickening. 18F-Fluorodeoxyglucose (FDG) positron emission tomography (PET) displays increased FDG uptake of inflamed artery walls delineating increased metabolism. Ultrasound and MRI are recommended to be the initial imaging modalities in cranial GCA and TAK, respectively. Extracranial disease can be confirmed by all four modalities, particularly by PET in case of inflammation of unknown origin. If the diagnosis remains uncertain, additional investigations including biopsy and/or additional imaging are recommended. Imaging should be performed by a trained specialist using appropriate operational procedures and settings with appropriate equipment. Further research is necessary on the role of imaging for disease monitoring. This review will discuss advantages and disadvantages of imaging modalities in the diagnosis of vasculitis.

Pulmonary artery aneurysms in Behçet disease

Pulmonary artery aneurysms (PAAs) are the most common type of pulmonary involvement in Behçet's disease. However, the relationships between clinical features and prognosis have not been sufficiently evaluated. This article describes the results of a comprehensive review, revealing that PAAs have a predilection for hemoptysis manifestations, increased dimensions, right lower lobar location, multiplicity and concurrent intramural thrombus formation. Surgical intervention was needed in one third of patients. Patients with massive hemoptysis and PAA rupture warranted emergency operations. Conservatively treated patients were prone to PAA progression; interventional embolization was associated with higher risks of recurrence and reintervention for PAAs; and surgically treated patients exhibited the highest mortality rates. In conclusion, PAAs in Behçet's disease are characterized by a predilection for hemoptysis manifestations, right lower lobar location, multiplicity, and concurrent intramural thrombus formation. Both the condition itself and the surgical operations it warrants are linked with high mortality due to PAA hemorrhage.

18F-fluorodeoxyglucose-positron emission tomography scanning is a useful tool for therapy evaluation of arterial aneurysm in Behçet's disease

[(18)F]fluorodeoxyglucose-positron emission tomography (FDG-PET) has demonstrated its usefulness in giant cell arteritis, Takayasu's arteritis, and unclassified aortitis. FDG-PET imaging could be more effective than CT-scan or magnetic resonance imaging in detecting the earliest stages of vascular wall inflammation. Data are lacking regarding its accuracy for diagnosis and follow-up of vascular lesions in Behçet's disease. We report the case of a 32-year-old woman with history of Behçet's disease and fever of unknown origin revealing voluminous pulmonary arterial aneurysms. FDG-PET scan revealed a peripheral uptake of pulmonary aneurysms, underlying the inflammatory status of arterial aneurysms wall. Our patient was treated by glucocorticoids and intravenous cyclophosphamide and achieved remission of Behçet's disease. During follow-up, FDG-PET scan enabled to detect an early radiologic therapeutic response after 4 months, while CT angiography remained unchanged. We report the first evidence of usefulness of FDG-PET scan for therapeutic evaluation of arterial aneurysms in Behçet's disease. Further studies are warranted to determine the accuracy of FDG-PET scan in larger cohort of Behçet's disease patients with vascular involvement.

New insights in the clinical understanding of Behçet's disease

Behçet's disease is a chronic relapsing multisystemic inflammatory disorder characterized by four major symptoms (oral aphthous ulcers, genital ulcers, skin lesions, and ocular lesions) and occasionally by five minor symptoms (arthritis, gastrointestinal ulcers, epididymitis, vascular lesions, and central nervous system symptoms). Although the etiology of Behçet's disease is still unknown, there have been recent advances in immunopathogenic studies, genome-wide association studies, animal models, diagnostic markers, and new biological agents. These advances have improved the clinical understanding of Behçet's disease and have enabled us to develop new treatment strategies for this intractable disease, which remains one of the leading causes of blindness.

Major vessel involvement in Behçet's disease: an update

PURPOSE OF REVIEW

Large vessel vasculitis occurs in a subgroup of patients with Behçet's disease who are at high risk for disease-related morbidity and mortality. Recognition of patients at risk, early detection of vasculitis, and aggressive treatment are essential for optimal care of these patients. We review the expanding knowledge on large vessel problems in Behçet's disease, highlighting recent contributions.

RECENT FINDINGS

Vasculo-Behçet patients are at risk for multiple vessel-related complications including thromboses, stenoses, occlusions, and aneurysms. The primary reason for clot seems to be an inflammatory process in the vessel wall. Less invasive endovascular procedures are increasingly used to treat aneurysms in Behçet patients.

SUMMARY

Because of earlier recognition, aggressive medical treatment, and novel surgical procedures, the morbidity and mortality of large vessel vasculitis in Behçet's disease are improving.

Detection of cardiovascular system involvement in Behçet's disease using fluorodeoxyglucose positron emission tomography

OBJECTIVES

Behçet's disease (BD) theoretically affects all sizes and types of vessels; however, there have been few reports describing the clinical efficacy of using (18)F-fluorodeoxyglucose positron emission tomography (FDG-PET) in patients with BD.

METHODS

Eight patients who were registered at the BD Specialty Clinic of Severance Hospital between 2004 and 2008 underwent FDG-PET scans to evaluate the cardiovascular presentations associated with BD. Medical records and FDG-PET images of the patients were retrospectively reviewed to determine the clinical significance of the cardiovascular findings.

RESULTS

The median quantitative FDG uptake index was 1.46 (range, 0.58-2.61). FDG uptake was detected in multiple pseudoaneurysms, aortitis and arteritis associated with aortic regurgitation, and aneurysmatic dilation of the sinus of Valsalva, atherosclerotic change of the proximal ascending aorta associated with aortic regurgitation, and multiple pulmonary artery aneurysms. The quantitative FDG uptake intensity was significantly associated with the ESR level.

CONCLUSIONS

FDG-PET scans may have clinical value as a workup study for patients with BD who have cardiovascular presentations.

Femoral profunda artery aneurysm as an unusual first presentation of Behcet disease

Behcet disease is a multisystem inflammatory disorder, rarely found in African Americans. Arterial involvement occurs in less than 8% of patients. Profunda femoral artery aneurysms (PFAAs) are extremely rare and often occur with synchronous aneurysms. We present a case of an African American man diagnosed with Behcet disease from his presentation with PFAA. He was also found to have a synchronous hypogastric artery aneurysm. The patient was immediately treated with corticosteroids and infliximab to control systemic and vascular inflammation, returning 1 month later for surgery. He had a repair of the left PFAA with a common femoral to profunda femoris artery bypass with reversed saphenous vein graft and aneurysmorrhaphy. When a patient presents with an aneurysm in an unusual location, it is important to evaluate for other aneurysms. A careful history and physical examination is also required to see if the aneurysm may be part of an underlying systemic syndrome.

Effectiveness and safety of endovascular aneurysm treatment in patients with vasculo-Behçet disease

PURPOSE

To compare long-term outcomes of endovascular and surgical treatment of arterial aneurysms in patients with vasculo-Behçet disease (VBD).

METHODS

The medical records of 912 patients with Behçet disease who were seen between May 1995 and January 2007 were reviewed. Among them, 34 (3.7%) patients with 39 non-cerebral aneurysmal lesions were diagnosed with VBD. Between February 1998 and November 2006, 16 VBD patients (14 men; mean age 39.2+/-9.2 years, range 25-63) were treated for 20 arterial aneurysms with an endovascular technique (stent-graft and/or coil embolization). All patients received immunosuppressive therapy (prednisolone 60 mg/d) before endovascular therapy to induce remission. From February 1993 to January 2007, 8 arterial aneurysms in 7 patients (all men; mean age 33.0+/-7.9 years, range 25-51) were treated with surgical graft interposition over 31.5+/-23.2 months.

RESULTS

The endovascular procedure was successful in all lesions. The mean follow-up was 47.6+/-41.8 months, during which 4 complications in 3 patients (3/16, 18.8%) occurred (2 occluded stent-grafts and 2 access site pseudoaneurysm). There were no deaths. The cumulative primary patency rate in the endovascular group was 89% at 24 months. In the 7 patients undergoing graft interposition for 8 arterial aneurysms, 3 (42.9%) events occurred in follow-up: 2 recurrent pseudoaneurysms and 1 aneurysm-related death.

CONCLUSION

In Behçet disease, aneurysm treatment is performed whenever possible because of the high risk of rupture. Endovascular treatment of arterial aneurysms was effective and safe, with an acceptable vascular complication rate and excellent patency of the treated site.

Usefulness of F-18 fluorodeoxyglucose positron emission tomography/computed tomography in a case of choriocarcinoma presenting as pulmonary embolism

This case demonstrates the utility of performing F-18 fluorodeoxyglucose positron emission tomography/computed tomography for the investigation of an unresolving pulmonary embolus, where early diagnosis of tumor thrombus or primary neoplastic conditions of the pulmonary artery may be made. Choriocarcinoma presenting within the pulmonary artery is rare although a literature review shows that a number of important differential diagnoses of hypermetabolic pulmonary lesions should be kept in mind.