neuroblastoma is the most common extracranial solid tumor in childhood. in different classification of neuroblastomas, a subset of undifferentiated or poorly differentiated tumors with bizarre histological features has been mentioned. a 3-year-old girl presented with abdominal pain. her haematological and biochemical parameters were normal except her urinary vanelylmandelic acid level was elevat...

Neuroblastoma is the most common extracranial solid tumor in childhood. In different classification of neuroblastomas, a subset of undifferentiated or poorly differentiated tumors with bizarre histological features has been mentioned. A 3-year-old girl presented with abdominal pain. Her haematological and biochemical parameters were normal except her urinary vanelylmandelic acid level was elevat...

Awareness of the variation and renal vascular abnormality at retroperitoneal space surgeries such as kidney surgery and transplantation is very important and necessary. Complexity in the veins development of the kidney area of fetus leads to a series of changes in the production of these veins, including the extra kidney vein, and the posterior aorta vein. In this case report, we present a case...

background: giant retroperitoneal uterine leiomyomas are uncommon. degenerative changes of a leiomyoma may lead to unusual presentation resulting in misdiagnosis preoperatively. the final diagnosis can be made either intraoperatively or histologically. case: we report a 45-year-old multiparous women presented with abdominal distension and fatigue for six months. abdominopelvic sonography and co...

paragangliomas are tumors that originate from extra-adrenal medullary neural crest derivatives. they are rarely located in retroperitoneal space. these tumors are often discovered incidentally during imaging studies performed for other reasons.periampullary cancers include adenocarcinomas arising from the pancreas, ampulla of vater, duodenum or distal common bile duct. the exact site of origin ...

hydatid disease is a parasitic tapeworm infestation that usually involves liver and lungs. primary retroperitoneal hydatid without liver and lung involvement is very rare. surgery is the principle method of treatment for large retroperitoneal hydatid, whenever feasible. we report a case of primary retroperitoneal hydatid cyst in 29-year-old male patient.

  This is a rare case report of bilateral Schwannoma in lower poles of both kindeys in a 36 year old diabetic man.preoperative radiographic evaluations suggested the presence of two solid retroperitoneal tumors attached to the lower poles of both kindeys without any regional or distant extension.the final diagnosis was confirmed by histological and immonohistological studies.