Primary extra-gastrointestinal stromal tumor of the omentum.

Gastrointestinal stromal tumors (GISTs) are mesenchymal tumors originating from interstitial cells of Cajal or related stem cell-like precursors present in the wall of the gastrointestinal tract. However, identical tumors originating from areas other than the gastrointestinal tract have been reported which are histologically identical to the usual GISTs. We are reporting a case of primary omental GIST in a 57-year-old female.