An 80-year-old man was admitted for severe anemia due to bleeding from a gastrointestinal stromal tumor (GIST). He also presented with multiple subcutaneous tumors on trunk and extremities. He was referred to us under a suspicion of neurofibromatosis 1 (NF1) because the association of GIST and NF1 is as high as 5 - 25%. However, he did not manifest any skin lesions suggestive of NF1. His son and grandson had similar subcutaneous tumors. In a histological examination, the tumors from the patient and his son were diagnosed as typical angiolipoma. allowing us to diagnose them as a rare familial angiolipomatosis. Angiolipoma is a common disease, but this case led us to a rare familial disease. Therefore, it is important to ask about additional family cases during interviews of patients with common diseases.
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