Carcinoma of the breast in women under the age of 30.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001943:Breast Neoplasms / Q000453:epidemiology*; D002648:Child; D004739:England; D005260:Female; D006801:Humans; D008875:Middle Aged