English word mastopathy comes from English -pathy, English mast-

Detailed word origin of mastopathy

Dictionary entry	Language	Definition
-pathy	English (eng)	Damage to, disease of, or abnormality. Suffering, feeling. Therapy.
mast-	English (eng)	Mastoid process. Relating to a breast or nipple.. Relating to homologous mammary organs, such as udders.
mastopathy	English (eng)	Any disease of the breast.

Words with the same origin as mastopathy