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...

Castleman’s disease, giant lymph node hyperplasia, is a kind of benign lymphoproliferative disease with gentle behavior. Its etiology and prevalence are unclear. This rare disease is usually found in mediastinal area asymptomatically and incidentally. It is also rare to see this tumor in the retroperitoneum. In this study, we have introduced a 34-year-old woman who referred just with occasional...

Cystic lymphangiomas are extremely rare benign vascular neoplasms generally found in childhood. Thought to arise from obstructed lymphatic channels during development, but may also secondary trauma, inflammation, malignancy, and surgery or radiation exposure. They usually seen the head neck axillary region, rarely abdominal cavity with only 1% occurring retroperitoneum. These typically asymptom...

BACKGROUND Colonic mobilization requires separation of mesocolon from underlying fascia. Despite the surgical importance of planes formed by these structures, no study has formally characterized their microscopic features. The aim of this study was to determine the histological and electron microscopic appearance of mesocolon, fascia, and retroperitoneum, prior to and after colonic mobilization...

BACKGROUND Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal neoplasms of the gastrointestinal tract. More rarely neoplasms with histology and immunohistochemistry similar to GISTs may occur outside the gastrointestinal tract ( omentum, mesentery and retroperitoneum) and are so-called Extra-gastrointestinal Stromal Tumors (EGISTs). EGISTs arising in the retroperitoneum are...

We report the imaging findings in a case of fetal lymphangioma involving the retroperitoneum and right lower extremity, and diagnosed by ultrasonography and magnetic resonance (MR) imaging at 26 weeks of gestation. Prenatal ultrasonograms and T2-weighted single-shot fast spin-echo MR images clearly revealed an extensive, multilocular cystic mass with internal hemorrhage in the retroperitoneum e...