Leiomyosarcoma of the inferior vena cava presenting as deep venous thrombosis; case report

Chronic graft thrombosis after en bloc resection of inferior vena cava leiomyosarcoma. A case report

Leiomyosarcoma (LMS) is a rare malignant tumor originating from smooth muscle cells. Primary leiomyosarcomas arising from vessels' walls are extremely rare (2%), with LMS of inferior vena cava being the most frequent subtype. We present the case of a 45-year-old man with a past medical history of resected leiomyosarcoma of the right calf, presenting with a follow-up CT showing a retroperitoneal mass arising from the inferior vena cava, which proved to be IVC leiomyosarcoma at histopathology. The patient underwent surgical resection of the mass with prosthetic reconstruction of the IVC. Three days after surgery he developed complete thrombosis of IVC graft which persisted at 3-months follow-up imaging and was treated with pharmacological therapy. Although there are many references reporting the association between LMS of the inferior vena cava and postoperative deep vein thrombosis, to our knowledge there are no reports currently available regarding complete thrombosis of IVC vascular graft after surgical resection of IVC LMS.

Surgical management strategy for leiomyosarcoma of Zone I-II inferior vena cava: A case series

OBJECTIVES

Leiomyosarcoma of inferior vena cava (IVC) is a rare clinical entity with severe vascular involvement. Surgical management of leiomyosarcoma is still challenging.

METHODS

This a retrospective study of consecutive patients referred to our hospital from January 2017 to June 2019. Depending on the anatomical site of affected IVC, leiomyosarcomas were categorized into zone I-II. The clinical data including baseline information, surgical parameters, peri-operative management, short- and mid-term outcomes were observed.

RESULTS

Four patients with leiomyosarcoma of zone I-III underwent radical resection without intraoperative mortality. Prosthetic grafts were interpositioned in all patients to instruct vena cava. Renal vein reconstruction was perfumed in two patients due to involvement to renal veins. Median blood loss was 450 mL (200-600 mL), median operative time was 215 minutes (150-240 minutes). No Clavien-Dindo IIIa or higher complication was observed. No organ dysfunction and recurrence were observed with median follow-up of 25.5 months.

CONCLUSIONS

Curative resection of zone I-II leiomyosarcoma is associated with longer survival in selected cases, en-bloc resection with complex vascular reconstruction could be considered.

A 10-year experience of leiomyosarcoma of the inferior vena cava

OBJECTIVES

Leiomyosarcoma of the inferior vena cava (IVC) is rare. The study reviewed patients with IVC leiomyosarcoma in our hospital in the past ten years.

METHODS

Twenty patients diagnosed with IVC leiomyosarcoma between October 2010 and October 2020 were enrolled. Their clinical manifestations, treatments, and follow-up results were analyzed.

RESULTS

The sarcoma was located in the lower IVC segment in six patients, with 13 in the middle and one in the upper IVC segment. Eighteen patients underwent R0 resection. After resection, 16 patients (80%) had primary repair of the IVC, while four patients underwent ligation. During a mean follow-up of 37.7 months, seven patients died due to tumor metastasis, four patients were alive with the tumor recurrence and other nine patients were alive without recurrence.

CONCLUSION

The management of the IVC after tumor resection depended on the tumor location and size. R0 resection provided a chance for long term survival.