noun
Medical term for a bony bump at the base of the big toe; often associated with hallux valgus (外反母趾).
See also: 外反母趾
腱膜瘤は外反母趾に伴って生じることが多い。
A bunion often develops along with hallux valgus.
祖母は腱膜瘤が痛んで歩きにくそうだ。
My grandmother seems to have difficulty walking because of bunion pain.
Compound of 腱膜 (aponeurosis) and 瘤 (lump, swelling). The exact historical derivation is uncertain; the term is a modern medical coinage.