Cystic Gastrointestinal Tumors: An Unusual Imaging Appearance − A Case Series

Gastrointestinal stromal tumors (GISTs) are commonly seen mesenchymal tumors of stomach and digestive tract. Morphologically they show similarities to other tumor types and were previously misclassified as leiomyomas, leiomyoblastomas, or leiomyosarcomas. GISTs are typically solid tumors with larger tumors showing areas of necrosis and rarely present with predominantly cystic changes. Here we report three cases of GISTs with predominant cystic component. Cystic GISTs although rare, should be considered as part of differential diagnosis for large intra-abdominal cystic lesions. Immunohistochemistry is critical for final diagnosis.