Year: 2026 | Month: July | Volume: 13 | Issue: 7 | Pages: 471-475
DOI: https://doi.org/10.52403/ijrr.20260748
Retroperitoneal Mucinous Cystadenoma of Ovarian origin: A Case Report
Dr. Nikhilesh1, Dr. Lakshminarayan G2, Dr. Ramesh M Tambat3, Dr. Mahesh BN4
1Post Graduate Resident, Department of General Surgery, Sapthagiri Institute of Medical Sciences and Research Centre (SIMSRC), Chikkabanavara, Bangalore – 560 090, Karnataka, India.
2Professor, Department of General Surgery, SIMSRC, Bangalore – 560 090, Karnataka, India.
3Professor and Head of Department, Department of General Surgery, SIMSRC, Bangalore – 560 090, Karnataka, India.
4Assistant Professor, Department of General Surgery, SIMSRC, Bangalore – 560 090, Karnataka, India.
Corresponding Author: Dr. Nikhilesh
ABSTRACT
Retroperitoneal mucinous cystadenoma of ovarian origin is an extremely rare tumour, with fewer than 100 cases reported since 1965. Its histogenesis remains unclear, as no epithelial tissue is normally present in the retroperitoneum. We report the case of a 65-year-old woman who presented with a seven-day history of insidious, progressive dull aching pain in the right upper abdomen. Examination revealed right flank fullness with a palpable, soft, non-ballotable, retroperitoneal mass measuring approximately 8x10 cm in the right lumbar region. Ultrasonography and contrast-enhanced CT of the abdomen and pelvis showed a unilocular cystic lesion of 300 cc with internal septations, adjacent to the ascending colon and extending up to the upper pole of the right kidney, with foci of wall calcification. She underwent exploratory laparotomy with cyst excision. Histopathological examination showed a cyst wall lined by mucinous tall columnar epithelium arranged in papillary and micropapillary architecture, with a high nucleocytoplasmic ratio and hyperchromatic, pleomorphic nuclei, consistent with a borderline mucinous cystadenoma of ovarian origin. The patient had an uneventful recovery. This case highlights that although retroperitoneal mucinous cystadenoma is a diagnostic challenge due to its non-specific presentation, early diagnosis and complete surgical excision followed by regular imaging follow-up yield a favourable outcome.
Keywords: Retroperitoneal mucinous cystadenoma, ovarian origin, borderline tumour, exploratory laparotomy, case report.
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