A RARE CASE REPORT GASTRO INTESTINAL STROMAL TUMOR (GIST) IN A JEJUNAL DIVERTICULUM

Introduction Jejunal diverticulosis is an uncommon condition and its association with gastrointestinal stromal tumor (GIST) is very rare. We report a rare case of GIST arising in a jejunal diverticulm presenting as a pelvic mass.Case report A fifty year old lady presented with a mass in the right lower abdomen associated with pain, vomiting and loss of weight. Computerised tomography of the abdomen showed a large, heterogenous mass arising from the right ovary. At laparotomy, however, she was found to have a large lobulated tumor arising from the jejunum which was resected. The mucosal surface of the resected jejunum showed the mouth of the diverticulm harbouring the tumor. Histopathology was suggestive of high grade GIST which was confirmed by immunohistochemistry. Patient was started on Tab. Imatinib 400 mgday. Conclusion Abdominal cavity continued to be a pandoras box and despite improvised imaging studies like computerized tomography, laparotomy is the final answer in clinching the diagnosis. Gastrointestinal stromal tumor( GIST) in a true jejunal diverticula is extremely rare and can be confirmed by immunohistochemistry