cases, lung Week 54: Case 4 April 26, 2023 pathadmin 1. Presented by Fred Askin, M.D. and prepared by Carol Allan, M.D.This patient was a 48 year old woman who presented with dyspnea, an abnormal chest radiograph with conspicuous interstitial markings and a large retroperitoneal mass./images/fa4a.jpg/images/fa4b.jpg/images/fa4c.jpgLangerhans' cell histiocytosisLysosomal storage diseasePulmonary veno-occlusive diseaseErdheim-Chester disease Loading...