Extragenital adenomatoid tumour of the omentum: an unusual location

Introduction Adenomatoid tumours are benig - n neoplasms that are mesothelial in origin and are usually confined to the genital tract and have rarely been reported at other sites such as the omentum, pleura, heart, liver, adrenal gland, retroperitoneum and intestinal mesentery. This paper discusses the unusual location of an extragenital adenomatoid tumour of the omentum. Case report We report the case of a 32-year-old woman who presented to our hospital with a four-day history of fever and pain in the right iliac fossa. Ultrasonography revealed a right ovarian cyst which was 2.5 cm in diameter and fluid in douglaseio. A right partial oopho - rectomy was performed, and duri - ng the operation, a well circu - mscribed mass measuring 2 cm was observed in the omentum. Histological evaluation of the cyst showed features of a cracked lute - al cyst and the mass showed feat - ures of an adenomatoid tumour. In the immunohistochemical study, the lesional cells were positive for calretinin, D240, CK5/6, HMBE1, CKAE1, CKAE3 and calponin. The treatment in such cases is tumour excision. W e report the case of an unusual extragenital adenomatoid tumour.