Breast cancer detected as an incidental finding on (99m)Tc-MIBI scintigraphy.

We report a case of breast cancer detected as an incidental finding on (99m)Tc-MIBI scintigraphy. (99m)Tc-MIBI scintigraphy is usually used to evaluate cardiac perfusion or to detect ectopic parathyroid adenomas; however, it is also known to sensitively detect breast cancer. Accordingly, a few reports have described the incidental detection of breast cancer by (99m)Tc-MIBI scintigraphy performed to detect parathyroid adenoma. Our present case underscores the importance of attending to any incidental findings when searching for parathyroid adenomas using (99m)Tc-MIBI scintigraphy.