Gastrointestinal and Extragastrointestinal Stromal Tumors: Report of Two Cases and Review of the Literature
An 82-year-old male patient diagnosed with pulmonary carcinoma underwent a lung and abdominal CT examination for preoperative staging, which showed a round homogeneous soft tissue mass of 4.8 × 5.5 cm in the stomach as an incidental finding (fig. ). Gastroscopy confirmed the presence of the mass. An endoscopic biopsy was taken and histology showed positive immunohistochemical staining for CD117, a defining feature of GIST in the stomach. The patient was scheduled for lung cancer resection, however he refused any medical treatment of the gastric lesion. For the next 4 years he had CT follow-up examinations for both malignancies, which demonstrated that the gastric mass remained unchanged, without any significant differences in the morphologic characteristics.