Tc-99m tetrofosmin lymph node uptake in myocardial perfusion imaging

A 60-year-old man, who was believed to have angina, underwent Tc-99m Tetrofosmin SPECT imaging during rest myocardial perfusion study, which showed an abnormal uptake with visualization of left axillary lymph nodes. Further investigation with Tc-99m nanocolloid lymphoscintigraphy and left axillary echography did not show neoplastic axillary lymph node enlargement. Abnormal lymph node uptake was probably due to lymphatic drainage after partial extravasation of radiopharmaceutical during left arm intravenous injection.