Tc-99m sestamibi uptake in infiltrating ductal carcinoma of the breast in a male patient.

A 73-year-old man had an asymptomatic, slowly growing breast nodule. The mammographic appearance was highly suspicious of a malignancy, but the patient refused to undergo a biopsy. Because breast carcinoma has been previously described to accumulate Tc-99m MIBI in women, mammoscintigraphy was performed as a complementary examination. Uptake of the agent was noted.