title: Pulmonary scintigraphy in fibrosing mediastinitis due to histoplasmosis.
abstract: The pulmonary scintigraphic findings from four patients with fibrosing mediastinitis due to histoplasmosis are reported. The ventilation/perfusion (V/Q) mismatch mimicked pulmonary emboli. However, in these cases the chest radiographs and/or gallium-67 scintigraphy were abnormal, suggesting mediastinal or hilar disease. Awareness of the nonembolic conditions that can result in V/Q mismatches is important in the interpretation of lung scans.
mesh_terms: D000293:Adolescent; D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D005710:Gallium Radioisotopes; D006660:Histoplasmosis; D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008297:Male; D008479:Mediastinal Neoplasms / Q000000981:diagnostic imaging; D008480:Mediastinitis / Q000000981:diagnostic imaging* / Q000209:etiology; D011655:Pulmonary Embolism / Q000000981:diagnostic imaging / Q000503:physiopathology; D011859:Radiography; D011877:Radionuclide Imaging; D014692:Ventilation-Perfusion Ratio
chemical_list: D005710:Gallium Radioisotopes