The valvular anatomy of the iliac venous system and its clinical implications

Three-Dimensional in Vivo Anatomical Study of Female Iliac Vein Variations

OBJECTIVE

To investigate female iliac vein variations by using the computed tomography angiography (CTA) three-dimensional (3 D) reconstruction technique.

METHODS

We retrospectively studied 1623 patients undergoing abdominal and pelvic CTA scanning for gynecological diseases from December 2009 to December 2018. Accurate digital 3 D models of the iliac vein were constructed using Mimics 19.0 software and used to study the morphology and variations. Variations in the common iliac vein (CIV), external iliac vein (EIV) and internal iliac vein (IIV) were classified as type I, abnormal number of veins; type II, abnormal communicating branches; or type III, other variations.

RESULTS

The overall variation rates of the iliac vein and CIV were 51.57% (837/1623) and 20.33% (330/1623), respectively. The main type of CIV variation was type II. The main type I CIV variation was the absence of the CIV (98.15%), which mostly occurred on the right side (64.81%, 35/54). Type II CIV variation was the most common, with abnormal communicating branches between the left CIV and right IIV (81.78%, 211/258). The overall variation rates of the EIV and IIV were 36.66% (595/1623) and 49.60% (805/1623), respectively, mainly on the right side. The main type of variation was type I. Among them, the division of the IIV into two branches plus convergence with the ipsilateral EIV was the most common (22.98%, 373/1623).

CONCLUSION

In this study, approximately half of the patients had iliac vein variations. The preoperative identification of iliac vein variation may reduce vascular injury in pelvic surgery.

Percutaneous Cementoplasty for the Pelvis in Bone Metastasis: 12-Year Experience

Background

In advanced cancer patients, pelvic bone metastasis often causes pain and gait disturbance. The use of percutaneous bone cement [polymethylmethacrylate (PMMA)] injection for pain management and strengthening in pelvic bone metastasis has rarely been reported. To evaluate this method, we aimed to determine surgical outcomes and complications over a long-term follow-up period using a large patient group.

Patients and Methods

We retrospectively collected data from 178 patients who underwent percutaneous cementoplasty for pelvic metastatic lesions, 201 in total. Surgical outcomes evaluated included pain reduction and improvement of ambulation. Mortality within 1 month after procedure and pulmonary embolism caused by thrombus, fat, tumor emboli, or bone cement were investigated as surgical complications. For long-term survivors, pain relapse and mechanical failure were analyzed. The mean follow-up period was 12.6 months, and there were 159 fatalities at last follow-up.

Results

The mean regional pain numerical rating scale scores decreased from 6.1 preoperatively to 2.4 1 month after procedure (p < 0.01). Gait function was maintained, worsened, and uncheckable in 68%, 24%, and 8% of patients, respectively, 1 month after procedure. Of long-term survivors followed up for > 12 months (n = 53), there were no significant changes in serial plain radiographs, and regional pain aggravation was observed in 9%. Pulmonary cement embolism and bone cement implantation syndrome was observed in 11% and 10%, respectively. However, all patients with these complications were asymptomatic.

Conclusions

Percutaneous cement injection into the pelvis is a feasible and safe palliative surgical option for patients with advanced malignancy in terms of pain reduction and maintenance of ambulatory function under regional anesthesia.

Surgical management of a large postoperative vulvar haematoma following vulvar phlebectomy and ovarian vein embolization for vulvar varicose veins: A case report

Vulvar varicose veins (VVs) are seen in 4% of women, most of them secondary to pregnancy and usually regressing spontaneously. The treatment of choice during pregnancy is conservative and symptomatic. Management of vulvar varicosities in non-pregnant women consists of various techniques, including phlebectomy, endovascular embolization or surgical ligation of contributing veins, sclerotherapy and, recently, conservative treatment with the venoactive agent MPFF (micronized purified flavonoid fraction). We report an unusual case of a large hematoma of the right labium majus following bilateral vulvar phlebectomy and embolization of the left ovarian vein. The patient was a non-pregnant woman, who underwent incision and drainage of this rare complication. At follow-up almost a year after this procedure the patient reported comfort and cosmetic satisfaction regarding her vulvar symptoms. A multidisciplinary team approach to vulvar varicosities is important, with the involvement of gynecologists, angiologists, interventional radiologists and vascular surgeons.

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Vulvar varicose veins remains a uncommon disease with various treatments available, surgical as well as conservative

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Serious complications after treatment of vulvar varicose veins have never been reported in the literature until today

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We report a case of a large hematoma of the right labium majus following vulvar phlebectomy and ovarian vein embolization

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The hematoma was successfully treated with surgical evacuation and the patient reported comfort and cosmetic satisfaction

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Multidisciplinary team approach is essential in order to provide an optimal choice of treatment for vulvar varicose veins

Female Pelvic Vein Embolization: Indications, Techniques, and Outcomes

Until recently, the main indication for pelvic vein embolization (PVE) in women was to treat pelvic venous congestion syndrome (PVC) but increasingly, patients with refluxing pelvic veins associated with leg varicosities are also being treated. A more unusual reason for PVE is to treat pelvic venous malformations, although such lesions may be treated with sclerotherapy alone. Embolotherapy for treating PVC has been performed for many years with several published studies included in this review, whilst an emerging indication for PVE is to treat lower limb varicosities associated with pelvic vein reflux. Neither group, however, has been subjected to an adequate randomized, controlled trial. Consequently, some of the information presented in this review should be considered anecdotal (level III evidence) at this stage, and a satisfactory 'proof' of clinical efficacy remains deficient until higher-level evidence is presented. Furthermore, a wide range of techniques not accepted by all are used, and some standardization will be required based on future mandatory prospective studies. Large studies have also clearly shown an unacceptably high recurrence rate of leg varicose veins following venous surgery. Furthermore, minimally or non-invasive imaging is now revealing that there is a refluxing pelvic venous source in a significant percentage of women with de novo leg varicose veins, and many more with recurrent varicosities. Considering that just over half the world's population is female and a significant number of women not only have pelvic venous reflux, but also have associated leg varicosities, minimally invasive treatment of pelvic venous incompetence will become a common procedure.

Lower extremity venous anatomy

The lower extremity venous system includes the superficial, deep, and perforating veins. The antegrade flow of blood within these veins is ensured by a system of muscular venous pumps and bicuspid valves. Dysfunction of the system may result from degeneration of the vein wall, post-thrombotic valvular damage, chronic venous obstruction, or dysfunction of the muscular pumps. Although chronic venous disease often receives less attention than arterial disease, it includes an array of manifestations resulting from a complex interaction of anatomy and hemodynamic failure. A thorough understanding of the highly variable venous anatomy is essential to understanding the underlying pathophysiology as well as in directing treatment.

Right internal iliac vein joining the left common iliac vein: case report demonstrated by CT angiography

An unusual variation of the iliac veins was detected by computed tomography (CT) angiography in a 35-year-old man. In coronal CT reconstructions, it was shown that the right internal iliac vein of this patient crossed to the left side and drained to the left common iliac vein. This variation is important in retroperitoneal, laparoscopic and orthopedic surgery. We present the CT findings and discuss the embryological origin of this unusual congenital anomaly.