Pseudomembranous Tracheobronchitis Caused by Rhizopus sp. After Allogeneic Stem Cell TransplantationWilliams, Kathryn E. MB, BCh, BAO*; Parish, James M. MD†; Lyng, Philip J. MD†; Viggiano, Robert W. MD†; Wesselius, Lewis J. MD†; Ocal, Idris T. MD‡; Vikram, Holenarasipur R. MD§Journal of Bronchology & Interventional Pulmonology: April 2014 - Volume 21 - Issue 2 - p 166–169 doi: 10.1097/LBR.0000000000000058 Brief Reports Abstract Author Information Invasive fungal infections are a major cause of morbidity and mortality in allogeneic stem cell transplant recipients. They can occasionally involve the tracheobronchial tree with serious clinical consequences. Tracheobronchial involvement is often an unexpected finding during diagnostic bronchoscopy. Herein, we report a case of pseudomembranous tracheobronchitis caused by Rhizopus sp. in an allogeneic stem cell transplant recipient. *Department of Medicine Divisions of †Pulmonary, Critical Care, and Sleep Medicine ‡Pathology §Infectious Diseases, Mayo Clinic, Scottsdale, AZ Disclosure: There is no conﬂict of interest or other disclosures. Reprints: Kathryn E. Williams, MB, BCh, BAO, 13400 E. Shea Blvd, Scottsdale, AZ 85259 (e-mails: firstname.lastname@example.org; email@example.com). Received May 19, 2013 Accepted February 17, 2014 © 2014 by Lippincott Williams & Wilkins.