Oncocytoma of Parotid Gland With Marked Uptake of 99m Tc-ethyl Cysteinate Dimer.

Amano, Yasuo; Amano, Maki; Tang, Xiaoyan · Clin Nucl Med · 2026

case_report · Level V

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Abstract

A 90-year-old man underwent SPECT with 99m Tc-ethyl cysteinate dimer (ECD) SPECT due to a 2-week history of aphasia and fever. 99m Tc ECD is a radiopharmaceutical that reflects cerebral blood flow. We present a case of parotid gland oncocytoma exhibiting marked ECD uptake in a brain SPECT scan. This finding suggests the certain extracerebral tumors may retain ECD due to intracellular mechanisms, potentially related to mitochondrial activity.

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