Primary retroperitoneal tumors are rare, and benign retroperitoneal tumors are exceptionally rare. Herein, we present a very rare case of benign concomitant retroperitoneal intramuscular hemangioma and intravascular papillary endothelial hyperplasia, with the unusual presentation of lumbosacral plexopathy. After surgical treatment and rehabilitation, the patient recovered uneventfully. This cas...

Enteric duplication cysts lacking anatomic association with the gastrointestinal tract are called isolated enteric duplication cysts (IEDCs). We present an atypical case of a retroperitoneal IEDC with a tortuous tubular complex shape that enfolded the surrounding retroperitoneal fat and mimicked a retroperitoneal teratoma. Multiplanar reconstruction images should be used to evaluate such a lesi...

Retroperitoneal liposarcoma is an infrequent, locally aggressive malignancy. We report two cases of huge retroperitoneal liposarcomas. The presence of a palpable abdominal mass was a common symptom of the two patients. Preoperative imaging study showed huge retroperitoneal tumors. Both patients underwent complete surgical resections, and a negative microscopic margin was achieved in both cases....

Retroperitoneal cystic mesothelioma is a very rare lesion. The pathogeny is unclear and establishing a preoperative diagnosis versus others retroperitoneal cystic lesions is difficult. Thus, with increasing experience in laparoscopic retroperitoneal surgery, the use of this approach for exploration of a retroperitoneal mass of unknown origin may provide an alternative to classic open surgery an...

idiopathic retroperitoneal fibrosis is a rare disorder of an unknown etiology characterized by an inflammatory proliferative fibrosing process that may involve the ureters in 80-100% of cases. â the present study was carried on a 38 years old man who was admitted to imam khomeini hospital with severe abdominal pain and renal failure. abdominal mri showed encasement of abdominal aorta and bilate...

BACKGROUND Extra-adrenal paraganglioma of the retroperitoneum with metastasis to the vertebra is very rare. To our knowledge this is the first report of this kind of disease in the literature. CASE PRESENTATION Here, we present an oroginal case of paraganglioma of the retroperitoneum with metastasis to the abdominal vertebra in a 42-year-old female patient who was successfully treated by comp...

OBJECTIVE To describe a case of renal angiomyolipoma treated by robotic assisted surgery. METHOD AND RESULTS We report the case of a 26 year old females patient, in the context of third month pregnancy, who was diagnosed of spontaneous self-limited retroperitoneal hemorrhage due to renal angiomyolipoma. The patient was treated conservatively until normal delivery. At the 3rd month postpartum ...

INTRODUCTION Spontaneous retroperitoneal hemorrhage is a distinct clinical entity that can present as a rare life-threatening event characterized by sudden onset of bleeding into the retroperitoneal space, occurring in association with bleeding disorders, intratumoral bleeding, or ruptures of any retroperitoneal organ or aneurysm. The spontaneous form is the most infrequent retroperitoneal hemo...

CONTEXT Autoimmune pancreatitis is characterized by diffuse enlargement of the pancreas, diffuse irregular narrowing of the main pancreatic duct, severe lymphoplasmacytic infiltration and fibrosis of the pancreas. Retroperitoneal fibrosis may occasionally be associated with autoimmune pancreatitis. CASE REPORT We report a 77-year-old man with autoimmune pancreatitis associated with retroperit...

REIDBORD, H.W. & HAWK, W.A. (1965) Idiopathic retroperitoneal fibrosis and necrotizing vasculitis. Report of a case with autopsy findings and etiologic considerations. Cleveland Clinic Quarterly, 32, 19. RUST, J.A. & MAAS, H.E. (1967) Pelvic retroperitoneal fibrosis with response to prednisolone. American Journal of Obstetrics and Gynecology, 98, 654. SALDINO, R.M. & PALUBINSKAS, A.J. (1972) Me...