Malignant Granular Cell Tumor of the Abdominal Wall Mimicking Desmoid Tumor: A Case Report with CT Imaging Findings and Literature Review
Granular cell tumor (GCT) is an extremely rare mesenchymal soft tissue neoplasm of Schwann cell origin. GCT may occur throughout the body, usually in the head and neck, trunk and upper extremities; rarely in the abdominal wall. They are usually benign and solitary; however, approximately 0.5 2% of GCTs are malignant tumors, and 5 10% of GCTs occur in the form of multiple lesions (1 4) While the benign GCTs are smaller and slow growing tumors, malignant GCTs (MGCTs) are larger and fast growing tumors, and exhibit a high rate of metastasis and short survival. The radiologic findings of the lesion have been described only in a few reports. In this article, we report a case of 66 year old man with pathologically proven MGCT arising in the abdominal wall muscles, illustrate the computed tomography (CT) findings of the lesion, and discuss imaging differential diagnosis.