Radiological Manifestations of Pulmonary Tuberculosis - A Comparative Study between Immunocompromised and Immunocompetent Patients.

Abstract

Pulmonary tuberculosis has atypical radiological manifestations in patients with underlying immunocompromised disease like diabetes and human immunodeficient virus infection. Computed tomography has important role in such patients for early diagnosis of disease and management to minimize complication. To evaluate and compare the computed tomography chest features of pulmonary tuberculosis in between immunocompromised patients and immunocompetent patients. This cross-sectional study was conducted in the hospital on newly diagnosed 60 pulmonary tuberculosis patients of which 30 patients had no underlying disease (Immunocompetent Group) and 30 patients had diabetes mellitus or were human immunodeficiency virus seropositive (Immunocompromised Group). CT scan of chest were evaluated for each patient. In immunocompetent patients, 36.7% had radiologically atypical presentation,90% had nodular opacities, 73.3% had consolidation, 23.3% had lymphadenopathy, 60% had cavitation and cavitatory lesion were single in 94.4% patients. Isolated upper lung field were involved in 60% patients. In immunocompromised patients 76.7% had radiologically atypical presentation, 66.7% had nodular opacities, 46.7% had consolidation, 63.3% had lymphadenopathy, 20% had cavitation and cavitatory lesions were multiple in 60% patients. Isolated lower lung field were involved in 23.3% patients. We concluded that immunocompromised patients have more atypical involvement of lung fields, higher prevalence of lymphadenopathy as compared to immunocompetent patients. Diabetic patients have multiple cavitatory lesions as compared to non-diabetic patients. HIV seropositive patients have more prevalence of lymphadenopathy as compared to HIV seronegative patients.