Chylous Mesenteric Cyst: A Rare Surgical Entity-A Case Report From Nepal.

Chylous Mesenteric Cyst is an uncommon benign abdominal cyst that can arise anywhere along the mesentery of the gastrointestinal tract, from the duodenum to the rectum. It is often asymptomatic but can rarely present with abdominal discomfort or a palpable abdominal mass. Final diagnosis typically relies on histopathology examination following laparoscopic or open excision. We present a 54 years old male who initially presented with right lower abdominal discomfort and lump. Computed Tomography (CT) demonstrated a large thin walled cystic lesion abutting and displacing the right ureter. Pre-operative ureteric stenting and laparoscopic excision of the cyst was planned. The cyst contained 700 mL of chylous fluid and was excised in toto. Histopathological examination was consistent with chylous mesenteric cyst. The ureteric stent was removed at the end of surgery. The patient was discharged with favorable outcome in second post-operative day. Mesenteric cysts are rare entities and appropriate planning is essential for a favorable outcome. Our case report demonstrates successful management of this rare condition with the use of minimally invasive surgery.