2021 Volume 67 Issue 7 Pages 443-446
Rhabdomyoma is a rare benign tumor classified as either cardiac or extracardic rhabdomyoma. Extracardiac rhabdomyoma is histopathologically categorized into adult, fetal, and genital types. Here we report a case of a 61-year-old man with adult rhabdomyoma occurring in the tongue. He consulted us after noticing a mass in his tongue. Since the tumor was small (diameter: 5mm), an excisional biopsy was performed under local anesthesia. Histopathologically, cross-striation and jackstraw-like crystals were clearly observed in the H-E and PTAH stained specimen. Also proliferation of round and polygonal tumor cells with eosinophilic granules and glycogen-rich cytoplasm were observed in the H-E stained specimen. As for the immunohistochemical findings, the tumor cells were positive for desmin, vimentin and HHF-35, while negative for myoglobin. On the basis of these results, a diagnosis of adult rhabdomyoma was established. He has not suffered a recurrence in the six years following surgical resection.
