A Diagnostic Challenge of Symptomatic Benign Primary Retroperitoneal Mucinous Cyst: A Case Report

Background: Retroperitoneal cyst is a rare event with diagnostic and therapeutic challenges. It may remain asymptomatic or present with vague symptoms such as abdominal distension or pain. In the event of late diagnosis, it might develop complications like infection, perforation, haemorrhage and malignant transformation. Objective: As there is not a single reported case from Bhutan, this is the first report to sensitise the clinicians so that they are aware about the rare possibility of this lesion. Case: A 34-year-old woman presented with abdominal pain was diagnosed as ovarian tumour. During laparotomy, the mass was found to be a retroperitoneal cyst which was excised completely with intact capsule. The uterus, bilateral ovaries and fallopian tubes were normal. Histopathology confirmed that it to be benign primary retroperitoneal cyst. Conclusion: Involvement of multidisciplinary team members would facilitate proper diagnosis and appropriate management of retroperitoneal cysts. Bangladesh Med Res Counc Bull 2021; 47(2): 225-229