Elevated (TcO4-)-Tc-99m Activity in Adenocarcinoma of the Lung

摘要

A 73-year-old man experienced chest tightness and shortness of breath for 9 months. Chest CT revealed a large right upper lobe mass. Pathology from CT-guided biopsy demonstrated poorly differentiated adenocarcinoma of the lung. Whole-body bone scan was acquired to evaluate possible bone metastasis. However, he was injected with (TcO4-)-Tc-99m erroneously instead of Tc-99m-MDP. The images showed a focus of elevated activity of (TcO4-)-Tc-99m in the known lung lesion.