Abstract: Gastrointestinal stromal tumors (GISTs) are the most common submucosal gastrointestinal mesenchymal stromal tumors and are usually seen incidentally on imaging studies. GISTs are most common in the stomach followed by the small intestine. Exophytic and mixed growth patterns are more common in small bowel GIST’s. GISTs occur in middle-aged and elderly population. They have an equal preponderance in males and females. Smaller GISTs are homogeneous and well-defined. Larger GISTs are heterogeneous and lobulated with or without areas of ulceration, calcification, hemorrhage, or necrosis. Larger GISTs have an increased risk of malignancy. High-risk GISTs are more common in the ileum. Malignant GISTs commonly metastasize to the liver and peritoneum. Intussusception and subsequent obstruction is a very uncommon presentation of these lesions because of their tendency to grow in an extraluminal fashion. A multimodality imaging approach may be needed for the diagnosis. Computed tomography scan is the imaging modality of choice as it depicts well both the exophytic and endophytic components of the lesion. We present a case of small bowel (ileal) GIST causing intussusception.
Suprabhat et al. (Wed,) studied this question.