Unveiling the Enigma: Port Site Metastasis in Laparoscopic Cholecystectomy - A Case Report With Cryptic Primary Tumor

The phenomenon of Port site metastasis post lap cholecystectomy with incidental carcinoma is common, but reporting of PSM with unknown primary is rare. Our literature search yielded only 4 such cases. We here report the case of a 70-year-old lady with symptomatic cholelithiasis who underwent LC at our institute, 6 months after which she developed a discharging mass at 2 of the previous laparoscopic port sites. The postoperative histopathology of the gall bladder was benign and even after a review of slides yielded no evidence of malignancy. A whole-body PET-CT scan was done for the patient but it revealed no primary tumor. The mass was ultimately resected after the necessary investigations and the defect closed primarily. Postoperative pathology was suggestive of adenocarcinoma with suspected pancreaticobiliary origin.