noun
thymoma
Medical term for a tumor originating from the epithelial cells of the thymus.
胸腺腫は縦隔腫瘍の一つです。
Thymoma is one of the mediastinal tumors.
腫瘍 is a general term for tumor; 胸腺腫 specifies a thymoma.
Compound of 胸腺 (thymus) + 腫 (tumor, swelling).