A 35-year-old woman came with progressive dyspnea on exertion and dry cough since six months
The frontal chest radiograph shows small reticular shadows coalescing - at places - into cystic paces. Fine nodular shadows alternate these reticular spaces. Both are more prominent in the lower zones. bases. Both the costophrenic angles are blunted.
The HRCT of the lungs shows round, thin-walled cysts diffusely distributed throughout the lungs.