Abnormal gallium scintigraphy in Pneumocystis carinii pneumonia with a normal chest radiograph.

The authors describe a patient with malignant lymphoma in whom the use of a 67Ga citrate lung scan assisted in the diagnosis of P. carinii pneumonia. In immunodeficient patients presenting with unexplained fever, abnormal pulmonary function tests, a normal chest radiograph, and few chest symptoms, the 67Ga citrate scan may lead to the early detection and successful treatment of this potentially lethal infection.