A case report: Acute abdominal pain caused by a mesenteric cyst in a 20 years old female patient.

Mesenteric cysts are documented as rare intra-abdominal benign tumors, whose etiology and classification controversy still exists. They are considered the rarest variety between the abdominal cysts and both its low incidence and the mistaken belief that was a trivial process without apparent symptoms, had contributed to their scarce knowledge. This study aimed to present a mesenteric cyst case with focal acute inflammation and four lymph nodes with follicular lymphoid hyperplasia. The study was performed 20-year-old female patient, examined in emergency department for abdominal pain 12 hours of evolution located in flank and left upper quadrant, with mild improvement after analgesic treatment, accompanied with mild fever. The patient presented left paramedian cystic formation measuring 4 cm in size with echogenic content inside. Exploratory laparoscopy treatment of emergency was proposed. The postoperative course was favourable remaining afebrile, no abdominal pain and good tolerance to oral intake, so it was hospital discharged within 72 hours of surgery. The diagnosis was mesenteric cyst with focal acute inflammation and four lymph nodes with follicular lymphoid hyperplasia. In conclusion, the type of surgery depended on the size of the cyst, its location in the peritoneal cavity and the experience of the surgeon. Laparoscopy technique was used as a first option.