Abstract
Most causes of superior vena caval (SVC) obstruction are caused by malignant mediastinal neoplasms, especially bronchogenic carcinoma. Less frequently SVC obstruction results from a non-malignant lesion such as mediastinal goiter or tuberculosis. We present a case of mediastinal tuberculosis which progressively enlarged as shown in consecutive Ga-67 citrate studies. As a result, SVC obstruction developed, exhibited by radionuclide SV Cavagram, and demonstrated "hot" spots in the radiocolloid scans.
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