Mucinous cystic adenoma of ovary mimicking as multilocular peritoneal inclusion cyst on Imaging-A case report

Ovarian mucinous cyst adenoma is a benign tumour arise from surface epithelium of ovary, it is a multilocular cyst with smooth outer and inner surfaces, it tends to be huge in size contains mucinous fluid. ovarian tumor is a common abdominopelvic cyst seen in perimenopausal women it can be often misdiagnosed as a peritoneal inclusion cyst due to similar presentation and mimicking findings on radiological imaging. we describe a perimenopausal female presenting with palpable abdominopelvic mass, her radiological imaging findings suggested peritoneal inclusion cyst. however histopathological revealed it as ovarian cyst adenoma, we discuss the possible ways to avoid such mistakes. Role of high resolution ultra sonography and computed tomography in analyzing clinically huge abdominopelvic cystic lesion in preoperative and prehistopathological correlation period

A multi parous perimenopausal female was reffered to our radiology department of saraswathi institute if medical sciences for imaging with history of, huge abdominopelvic distension which was gradual in onset since 2 years, vague abdominal pain, urinary frequency and constipation. High resolution ultrsonography revealed a large multiloculated cystic mass with internal cyst and septation seen extending from pelvis into the abdomen without solid components or surface papillary projections from left ovary, the right ovary, uterus and bladder awas normal and was abuttied to right. CT revealed a huge abdominopelvic multilocularcystic mass with multiple thin Septae and cyst within cyst separately from uterus, right ovary. Left ovary was seen embedded within the cystic mass, no solid area within the cystic mass, no lymph adenopathy, no ascites was seen, on postcontrast study mild enhancement of Septae. A provisional diagnosis of multilocular peritoneal inclusion cyst was made owing to visualisation of both ovary normal. Histopathological revaled mucinous cyst adenoma devloping from left ovary

Mucinous ovarian cyst adenoma should be included in the differential diagnosis of ovarian cyst mass in perimenopausal female, as it is a rare entityand rare at extremities of age before puberty and aftermenopause and common between third and fifth decades.

We are reporting a case of mucinous ovarian cyst adenoma which was diagnosed as peritoneal inclusion cyst because of visualisation of part of left ovary which we thought as a complex left ovarian cyst.