A 56-year-old woman, a sweeper since 30 years, came with gradual onset breathlessness, cough and fever-on and off- since six months
The frontal chest radiograph shows multiple, short linear and criss cross scars in both lung fields , most prominently in the perihilar regions. HRCT scan shows patchy areas of ground glass opacities scattered diffusely in all the segments of both the lungs.