1. Mutually exclusive extracellular signal‐regulated kinase pathway mutations are present in different stages of multi‐focal pulmonary Langerhans cell histiocytosis supporting clonal nature of the disease. Issue 3 (29th April 2016) Authors: Kamionek, Michal; Ahmadi Moghaddam, Parnian; Sakhdari, Ali; Kovach, Alexandra E; Welch, Matthew; Meng, Xiuling; Dresser, Karen; Tomaszewicz, Keith; Cosar, Ediz F; Mark, Eugene J; Fraire, Armando E; Hutchinson, Lloyd Journal: Histopathology Issue: Volume 69:Issue 3(2016) Page Start: 499 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗