sodium-pertechnetate-tc-99m and Adenocarcinoma-of-Lung

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 99mTcO4- erroneously instead of 99mTc-MDP. The images showed a focus of elevated activity of 99mTcO4- in the known lung lesion.

Topics: Adenocarcinoma of Lung; Aged; Humans; Male; Sodium Pertechnetate Tc 99m; Tomography, X-Ray Computed

A 76-year-old woman underwent 99mTcO4- thyroid scintigraphy to clarify thyrotoxicosis. In addition to suppressed thyroid uptake, an atypical tracer accumulation appeared on already know pulmonary adenocarcinoma in the left lung upper lobe. Surgical pathology was reviewed confirming the diagnosis of lung adenocarcinoma with focal mucins production and excluding a misdiagnosed differentiated thyroid carcinoma metastasis.

Topics: Adenocarcinoma of Lung; Aged; Biological Transport; Female; Humans; Incidental Findings; Radionuclide Imaging; Sodium Pertechnetate Tc 99m

Possible thyroiditis was suspected in a 56-year-old man who initially presented sore throat because laboratory examinations revealed decreased serum thyroid hormone and the Tc-pertechnetate scintigraphy showed no tracer uptake by the thyroid gland. However, subsequent examination demonstrated that the absence of pertechnetate activity in the thyroid was due to complete replacement of thyroid gland by the metastasis from lung adenocarcinoma, which was unknown at the initial presentation.

Topics: Adenocarcinoma; Adenocarcinoma of Lung; Diagnosis, Differential; Humans; Lung Neoplasms; Male; Middle Aged; Radionuclide Imaging; Sodium Pertechnetate Tc 99m; Thyroid Neoplasms; Thyroiditis