Synovial sarcoma is a well-recognized malignant mesenchymal neoplasm. Primary retroperitoneal synovial sarcoma is extremely rare and has poor prognosis. There are sparse reports in the literature on the secretory synovial sarcomas. In this report, we present the case of a patient with retroperitoneal synovial sarcoma who presented with recurrent attacks of hypoglycaemia.

Multiple myeloma, a plasma cell neoplasm, presents most commonly with anemia, hypercalcemia, renal failure, and bone pain. Only few cases of clinical aggressive presentation associated with bleeding were reported in the medical literature. The reported cases included gastrointestinal bleeding and cardiac tamponade. Spontaneous retroperitoneal haemorrhage as initial presentation has not been so ...

primary retroperitoneal mucinous tumor (prmt) of low malignant potential (border line) is an uncommon neoplasm with fewer than 50 reported cases. uncertain diagnostic imaging results make diagnosis of its origin difficult, preoperatively. later treatment planning and prognosis would be affected by exact diagnosis of the tumor origin. this study presents a case of persian woman with diagnostic, ...

A case of a large retroperitoneal tumor in a previously asymptomatic twenty-two-year-old white female is presented. A review of the literature confirms the rarity of this tumor. Its histologic and embryologic derivation as well as its subtle and bizarre method of presentation are discussed. The cause of such lesions is debatable, but primary cure can be accomplished by meticulous excision of th...

Thymoma is an epithelial neoplasm of the thymus, which commonly lies in the anterior mediastinum and recurrences of thymoma generally are locally, and retroperitoneal recurrence is considered to be rare. A 46-year old Asian woman with invasive thymoma had undergone thymectomy 10 years ago. Computed tomography demonstrated a well-circumscribed mass in the left retroperitoneal space. The patient ...

Abdominal cystic lymphangioma is a rare benign neoplasm. Less than 1% of lymphangiomas is in the retroperitoneum. Lymphangioma is mostly asymptomatic. Chronic symptoms were reported in retroperitoneal type more than others. Acute symptoms due to complications like infection, cyst rupture or hemorrhage may occur. We report an 18-years-old girl with low back pain from 6 months ago with huge pelvi...

Retroperitoneal E-GIST is a very rare tumor and a total of 58 cases have been reported in the literature (2). The distinction of E-GIST from gastrointestinal stromal tumors (GIST) is made by proving the origin outside the alimentary system and ruling out a concurrent neoplasm in the gastrointestinal tract. In this letter, we aimed to report a very rare form of E-GIST arising from the retroperit...

Castleman's disease is a rare nonclonal proliferative disorder of the lymph nodes with an unknown etiology. Common locations of Castleman's disease are mediastinum, neck, axilla, and abdomen. Castleman's disease of a peripancreatic location masquerading as pancreatic neoplasm is an even rarer entity. On search of published data, we came across about 17 cases published on peripancreatic Castlema...

Primary osteosarcoma of the kidney is a very rare neoplasm with a very poor prognosis and unclear histogenesis. Only 20 cases have been reported in the literature. It has a strong tendency to recur locally and spread to distant sites. We present the clinical case of a 79-year-old man affected by a primary osteosarcoma of the kidney presenting with substantial retroperitoneal tumor hemorrhage. L...

The neurofibroma is a tumour of neural origin. This kind of neoplasm, though, is generally skin located. Rare cases in deep organs or in the peritoneal cavity are also reported in the literature. There are two types of neurofibromas, localized and diffuse; the latter is associated with von Recklinghausen disease and always occurs together with skin neurofibromas. Here we report the case of a 47...