title: [Metaplastic breast cancer].
abstract: Three groups of metaplastic mammary carcinoma are distinguished: squamous cell carcinoma, invasive ductal carcinoma with partial squamous metaplasia and carcinoma with formation of heterologous elements. Squamous cell carcinoma is subdivided into 5 variants: solid and spindle cell variants, carcinoma in preexisting cyst and fibroadenoma; carcinoma resulting from total squamous metaplasia of invasive ductal carcinoma. Squamous cell mammary carcinoma has a relatively favourable prognosis. Partial squamous metaplasia has minimal influence on the course of the disease.
authors.forename: N N
authors.initials: NN
authors.lastname: Volchenko
authors.forename: G A
authors.initials: GA
authors.lastname: Frank
authors.forename: R I
authors.initials: RI
authors.lastname: Iakubovskaia
authors.forename: T A
authors.initials: TA
authors.lastname: Karmakova
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000145:classification / Q000473:pathology*; D018270:Carcinoma, Ductal, Breast / Q000145:classification / Q000473:pathology*; D002294:Carcinoma, Squamous Cell / Q000145:classification / Q000473:pathology*; D006801:Humans; D008679:Metaplasia; D008875:Middle Aged