A 55-year-old man presents with a solitary breast mass and biopsy reveals malignant cells. Immunohistochemical staining experiments show that the tumor cells are positive for HER2/neu and cytokeratins 4 and 11 and negative for estrogen receptors. Which of the following is thought to play a role in the development of cancer in the patient?
Correct Answer: BRCA2 mutation
Description: Predisposing factors for the development of breast cancer in men are largely unknown, although mutations in the BRCA2 gene increase the risk of this tumor. Choices B, C, and D are not risk factors for breast cancer in men. PTEN mutations (choice E) are associated with endometrial intraepithelial neoplasia and endometrial adenocarcinoma.Diagnosis: Male breast cancer
Category:
Pathology
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