Primary mucinous cystadenomas are rare retroperitoneal tumors that are exclusively found in women. The histogenesis of these tumors is still uncertain, though mucinous metaplasia of the mesothelial lining cells is the most likely hypothesis. We report a 19-year-old pregnant female, initially believed to have a severe hydronephrosis of left kidney, but was finally diagnosed as a retroperitoneal ...

BACKGROUND Inflammatory pseudotumors were mostly encountered in the lung. Retroperitoneal inflammatory pseudotumors are relatively rare. Although laparoscopic surgery with a modified flank position is widely performed for retroperitoneal tumors, we placed the patient in the supine position to maintain the normal anatomical view of the retroperitoneal space. We report a case of retroperitoneal i...

Received April 2007 Accepted June 2007 INTRODUCTION Although leiomyosarcoma is among the most common nonepithelial retroperitoneal tumors along with fibrosarcoma, liposarcoma, and malignant lymphoma, it only constitutes 5% to 15% of all retroperitoneal tumors. About 70% of leiomyosarcomas are found in the retroperitoneal space.(1) Extensive surgical resection for achieving complete removal and ...

Retroperitoneal schwannomas are rare, usually benign tumors that originate in the neural sheath and account for only a small percentage of retroperitoneal tumors. We report a case of a 34-year-old male presented to our department complaining of left abdominal mass and pain. An abdominal computed tomography (CT) scan showed a large retroperitoneal mass of 15 cm in diameter. Histopathological exa...

CONTEXT Retroperitoneal sarcomas are rare neoplasms. Computed Tomography or Magnetic Resonance Imaging is performed in patients with these tumors to detect local extent and distant metastases of the tumor and for preoperative surgical planning. However the evaluation and treatment of retroperitoneal sarcomas are challenging because of its rarity and frequent presentation with advanced disease i...

Lipomas can occur almost anywhere in the body, but retroperitoneal lipomas are extremely rare. They are slowly growing benign tumors and can attain an enormous size due to silent course of the disease. Total excision of the mass is the treatment of choice and is curative for benign retroperitoneal lipomas. We treated an 11-month-old female patient with giant retroperitoneal lipomas by surgical ...

Neuroendocrine tumors are either epithelial or neural in origin. Neuroendocrine tumors of the retroperitoneum are mostly metastatic. Primary epithelial neuroendocrine tumors of the retroperitoneum are exceedingly rare. We describe a case of a retroperitoneal tumor that was discovered incidentally during exploratory laparotomy for small-bowel obstruction. Histopathologic and immunochemical analy...