Atypical Presentation of Complicated Dermoid Cyst of Ovary Mimicking Diverticular Abscess

Background: Cystic teratomas comprises 20% overall among all ovarian neoplasia. They are made of derivatives of at least two of three germ layers. Histologically different dermoid cyst contains only well differentiated embryological elements of ectodermal layer. Diverticulitis of colon mainly affects elderly population having abscess formation causing lower abdominal pain. Case presentation: We report a case of 50 yr old woman presenting with lower abdominal pain. From barium enema, ultrasound and CT we suggested the probability of diverticular abscess. Patient was undergone left salpingo-oophorectomy with repair of adhered part of sigmoid colon. Post op biopsy shows typical features of dermoid cyst. Conclusions: We illustrate how a dermoid cyst may be diagnosed as diverticular abscess by imaging. We also showed the rupture of dermoid cyst into sigmoid colon with communication formation. So we the radiologists must be aware of all possible differential diagnosis of lower abdominal pain in elderly female, so that we can help our fellow surgeons to treat properly. Keywords: Cystic teratoma, Diverticulitis, Post menopausal, Sigmoid Colon.