sodium-pertechnetate-tc-99m and Kidney-Neoplasms

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

In static scintigraphy with 99m Tc-pertechnetate of primary lesions of the retroperitoneal space in children 4 types of scintigraphic pictures were singled out for differential diagnosis of Wilms' tumors, avascular benign lesions of the retroperitoneal space and neurogenic retroperitoneal tumors. The sensitivity of diagnosis of Wilms' tumor was 92.6%, specificity 90.9%. The most objective and complete information on the kidney involvement in tumor process could be obtained in static scintigraphy with 99m Tc-pertechnetate combined with scintigraphy with 99m Tc-gluconate or 99m Tc-pyrophosphate. The sensitivity of diagnosis of secondary lesions of the lymph nodes of the retroperitoneal space was 76.8%.

Topics: Adolescent; Child; Child, Preschool; Diphosphates; Gluconates; Humans; Infant; Kidney Neoplasms; Organotechnetium Compounds; Radionuclide Imaging; Retroperitoneal Neoplasms; Sodium Pertechnetate Tc 99m; Technetium; Technetium Tc 99m Pyrophosphate; Wilms Tumor

This case report describes a patient in whom concentration of Tc-99m pertechnetate in a renal calyx created a false diagnostic impression of ectopic gastric mucosa. The administration of furosemide demonstrated the benign cause of the focus.

Topics: Adult; Choristoma; False Positive Reactions; Female; Gastric Mucosa; Humans; Kidney Calices; Kidney Neoplasms; Radionuclide Imaging; Sodium Pertechnetate Tc 99m

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