An unusual cause of "appendicular pain" in a young girl: mesenteric cystic lymphangioma.

Pain of the right iliac fossa in young girls can relate to several pathologies of the gastrointestinal and genitor-urinary tract. On the other hand, lymphangiomas in the peritoneal cavity are extremely rare. We report the case of a young woman with pain in the right iliac fossa caused by a cystic lymphangioma. A 17-year-old caucasian female patient presented with abdominal pain in the right iliac fossa and flank of a 1-month duration. The patient was apyrexic and laboratory tests were negative. CT/MRI of abdomen showed a cystic mass (max diameter 60 mm) in the retrocaecl adipose tissue in connection with the caecum and appendix. The patient underwent a total excision of the lesion and appendicectomy. Histopathological examination was consistent with the diagnosis of mesenteric lymphangioma. This case shows a rare but possible cause of right iliac fossa pain in young women to be considered in the differential diagnosis.