Abstract

A Rare Case of Retroperitoneal Tumor with Vascular Encasement

Retroperitoneal tumors are extremely rare tumors occurring in the retroperitoneum. Retroperitoneal tumors are divided into benign tumors and malignant tumors, including retroperitoneal sarcoma. Approximately 70%-80% of primary retroperitoneal soft tissue tumors are malignant; however, these only account for 0.1%-0.2% of all malignancies.

Retroperitoneal tumors are extremely rare tumors occurring in the retroperitoneum bounded anteriorly by the posterior parietal peritoneum and posteriorly by the transversalis fascia. Retroperitoneal tumors originally develop from soft tissues including fats, muscles, nerves, lymph nodes and blood or lymphatic vessels. Retroperitoneal tumors sometimes involve retroperitoneal organs, such as the kidneys, adrenal glands, pancreas and intrapelvic organs (the bladder, uterus, ovaries, prostate, etc.).

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