Multicystic peritoneal mesothelioma treated with complete cytoreductive surgery, peritonectomy and hyperthermic intra-peritoneal chemotherapy-A case report.

Background: Multicystic Peritoneal mesothelioma is a rare and distinct variety of peritoneal mesothelioma with borderline malignant potential. Conventional Tumor bulking has been associated with recurrence of 45-50 %. Hence a comprehensive treatment with Complete cytoreductive surgery with involved field peritonectomy (CRS) and Hyperthermic Intra-peritoneal chemotherapy (HIPEC) is being increasingly adopted for MCPM.

Case Presentation: A 47 year old lady evaluated for peri-menopausal disturbance was diagnosed to have a multicystic lesion in the pelvis. With a preoperative suspicion of diagnosis of pseudomyxoma peritonei, CRS with HIPEC was planned. On exploration a diffuse multicystic mass was found in omentum and pouch of douglas with typical morphological features of MCPM. Complete cytoreduction was achieved with anterolateral and sub-diaphragmatic peritonectomy, omentectomy and panhystrectomy. HIPEC was performed with cisplatin 50 mg/m for 40 min. Pathological examination revealed MCPM of omentum and uterine surface with focal clusters of mesothelial proliferation. However there was low proliferative activity 1-2 %.

Discussion: MCPM presents with wide spread peritoneal spread but with relative sparing of visceral invasion. Literature review suggests the disease spread is similar to PMP and treatment with CCRS and HIPEC has yielded long term survivals in MCPM.

Conclusions: This patient with voluminous disease burden in abdomen required surgical management and HIPEC for her condition. Whether CCRS alone without HIPEC can be an alternative for limited disease will be interesting research for future clinical reports.