Noninvasive evaluation of mediastinal metastases in bronchogenic carcinoma: a prospective comparison of chest radiography and gallium-67 scanning.

Evaluation of regional node involvement in patients with bronchogenic carcinoma is a crucial step in determining therapy and prognosis. Mediastinoscopy has been recommended for staging all potentially operable cases, but technical limitations and the need for anesthesia make this impractical. Gallium-67 scanning and chest radiography were prospectively compared as noninvasive means of evaluating spread to regional nodes in 75 patients with bronchogenic carcinoma in whom histologic evaluation of hilar and mediastinal nodes was performed.

Accumulation of Tc-99m-DTPA in uterine myoma.

A case is presented in which concentration of Tc-99m-iron ascorbate-DTPA has been demonstrated in a benign leiomyoma of the uterus. Increased vascularity in the tumor might be the cause of the Tc-99m-DTPA uptake.

Radionuclide Meckelogram with particular reference to false-positive results.

Abdominal imaging 99mTc-pertechnetate is a most sensitive and noninvasive procedure for detecting Meckels diverticulum. However, false-positive results are unavoidable. We report two in which false-positive results were obtained and present a summary of reported false-positive results.