Gastrointestinal Stromal Tumors Incidentalomas: A Case Series.

Background: Gastrointestinal stromal tumors (GISTs) represent approximately 0.2% of all gastrointestinal tumors. GISTs can occur anywhere along the length of the gastrointestinal tract. Most common clinical manifestations of GISTs include GI bleeding, abdominal discomfort, distention and pain. Small lesions can be found incidentally during imaging studies, endoscopy, surgery and post-mortem. The progression of disease from incidentally found indolent to symptomatic disease is unknown.

Case series: Here we describe a series of cases of incidentally found GIST and their management. The first patient was a 38-years old morbid obese female with an incidentally found GIST in the stomach following an elective laparoscopic vertical sleeve gastrectomy. The second patient was a 69-year-old male who underwent elective sleeve gastrectomy for his obesity and associated refractory acid reflux. On pathologic examination of the gastrectomy specimen, GIST was diagnosed in the gastric fundus.

Discussion: Coexistence of GIST with other malignancies is higher than previously reported and should draw attention of clinicians towards these incidental findings. Prognosis in these patients is usually determined by other malignancy and not significantly influenced by GIST. Therefore, treatment algorithms should be focused on prognostically relevant malignancy.