A 48-year-old man was referred to our institute for the evaluation of a concomitant gastric submucosal
tumor and right adrenal
tumor, incidentally found by ultrasound examination. Computed tomography showed a mass with a diameter of 6 cm adjacent to the stomach and the right adrenal
tumor with a diameter of 3 cm. These
tumors had similar characteristics in both plain and enhanced imagings. By magnetic resonance imaging, the intensity of the right adrenal
tumor was equivalent to the liver in both T1 and T2 weighted images. On the other hand, the gastric submucosal
tumor showed low intensity in T1 weighted images and high intensity in T2 weighted images. An
adosterol scintigram showed slight accumulation at the region of adrenal
tumor. The results of all conducted serum and urinary hormonal examinations were found to be within the normal range.
Adrenalectomy and partial
gastrectomy were performed laparoscopically. Pathological diagnosis of the adrenal
tumor was a cortical
adenoma, and that of the gastric submucosal
tumor was
gastrointestinal stromal tumor (GIST). The gastric
tumor was immunohistochemically stained positive with the C-kit and CD34 and negative for
s-100 protein and
desmin. Histopathological diagnosis was coincident with gastric GIST and right
adrenocortical adenoma, and the GIST was diagnosed as a high risk
tumor because its diameter was over 5 cm.