High resolution chest computed tomograms of the chest in case 2 with subacute hypersensitivity pneumonitis: (A) ground glass opacifications and centriacinar micronodules (before treatment) and (B) resolution of the findings (after treatment). High resolution chest computed tomograms of the chest in case 2 with subacute hypersensitivity pneumonitis: (A) ground glass opacifications and centriacinar micronodules (before treatment) and (B) resolution of the findings (after treatment). E Küpeli et al. Postgrad Med J 2004;80:339-345 Copyright © The Fellowship of Postgraduate Medicine. All rights reserved.