sodium-pertechnetate-tc-99m and Carcinoma--Renal-Cell

A 55-year-old man, with a history of nephrectomy for renal cell carcinoma, was evaluated using radionuclide angiocardiography to exclude cardiac shunts as the cause of vascular bruits heard at auscultation. A pulmonary time-activity curve derived from the right lung showed a pattern typical of a large left-to-right shunt, whereas that from the left lung was normal. Increased systemic arterial flow to the lateral right chest was noted in early dynamic images. Subsequent studies revealed that this flow and the abnormal time-activity curve of the right lung were due to systemic arterial supply to metastatic pleural cancer, originating from the kidney. The authors conclude that special caution should be undertaken in the interpretation of the radionuclide angiocardiography for determining left-to-right cardiac shunts, especially in those showing a asymmetric pulmonary time-activity curve.

Topics: Carcinoma, Renal Cell; False Positive Reactions; Humans; Kidney Neoplasms; Male; Middle Aged; Pleural Neoplasms; Pulmonary Circulation; Radionuclide Ventriculography; Sodium Pertechnetate Tc 99m

Topics: Aged; Carcinoma, Renal Cell; Female; Gallbladder Neoplasms; Humans; Kidney Neoplasms; Male; Middle Aged; Radionuclide Imaging; Sodium Pertechnetate Tc 99m; Thyroid Neoplasms

Metastatic neoplasms to the thyroid that become clinically apparent are rare, but a patient that presents with a thyroid nodule and a history of a prior malignancy elsewhere (especially a renal neoplasm) should be thought to have a metastatic nodule first and a nodule of thyroid origin second. This report describes a 66-year-old woman who presented with a large symptomatic thyroid nodule and a history of a right nephrectomy for renal carcinoma two years previously.

Topics: Aged; Carcinoma, Renal Cell; Female; Humans; Kidney Neoplasms; Radionuclide Imaging; Sodium Pertechnetate Tc 99m; Thyroid Neoplasms