male adenoid cystic carcinoma of breast

Introduction: adenoid cystic carcinoma (acc) of the breast is a rare tumor, especially observed in males. case presentation: we presented a 42-year-old man, initially diagnosed with small cell carcinoma (scc) by core needle biopsy. he underwent breast modified radical mastectomy (mrm) and axillary lymph node dissection; his final histopathological diagnosis was acc. after surgery, although the patient was recommended to have post-operative chemo-radiotherapy, he did not comply. the patient is on follow-up for more than a year with no recurrence until now. conclusions: acc of the breast is a rare malignancy with excellent prognosis and favorable tumor biology. it could be mistaken with triple negative breast cancer, ductal carcinoma in situ (dcic), and small cell carcinoma.