title: Bilaterality of cancer of the breast. Biopsy of the opposite breast.
mesh_terms: D001706:Biopsy; D001943:Breast Neoplasms / Q000175:diagnosis*; D002277:Carcinoma; D005260:Female; D006801:Humans; D008408:Mastectomy; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis*; D011379:Prognosis