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 ...

introduction uterine leiomyomas are the most common benign solid tumors of the female pelvis. retroperitoneal myomas are extremely rare and usually malignant with the common location being in the pelvis. case presentation our case involved a woman who was suffering from dysparonia and radiculating right pelvic pain. the pelvic examination revealed a palpable tender mass of about 3-4 cm in size ...

  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 pel...

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...

we present here a 32-year-old male with advanced lately diagnosed, right sided retroperitoneal mass, which had been already treated due to progressive muco-cutaneous lesions clinically consistent with psoriasis, during recent four years. the advanced retroperitoneal mass resected surgically and reported as hyaline-vascular castleman disease with a dense focus of coarse calcification, on histopa...

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...

 Abstract Castleman disease or giant node hyperplasia is a rare disorder of the lymphoid tissue most often involving the mediastinal lymph nodes. We report a case of localized retroperitoneal hyaline-vascular type of Castleman disease. A 35-year old woman presented with mild epigastric pain with radiation to the back. Amild anemia was the only abnormal associated finding. Abdominal ultrasound a...