Poudel, RAcharya, APokhrel, SAdhikari, SK2025-10-092025-10-092015https://hdl.handle.net/20.500.14572/2519Poudel R, Acharya A, Pokhrel S, Adhikari SK Department of Surgery National Academy of Medical Science Bir Hospital, KathmanduABSTRACT Mucinous cystic neoplasms are rare tumors of uncertain histogenesis. They arise from the ovaries, pancreas, and other intra-abdominal sites but more unusually from the mesentery. They can present with abdominal pain, distension, or a palpable mass but are commonly an incidental finding. We present a case of a 33 year old female who presented with complain of pain abdomen for one-year duration. On Physical examination there was a palpable lump in right lumbar region extending to right iliac fossa. CT scan of abdomen and pelvis suggested the mass to be a Mesenteric Cyst. Enucleation of the cyst was done and histopathology report revealed Mucinous Cystic borderline tumor of the Mesentery. KEYWORDS Borderline, cystic, mesentery, mucinous.en-USBorderlineCysticMesenteryMucinousArticle