Severe Case of Legionella pneumophila Pneumonia in the Debut of Hairy Cell Leukemia: Case Report and Brief Review of the LiteratureHuaman, Moises A. MD*; Coz-Yataco, Angel MD†; Pokharna, Hiren MD‡; Stagner, Lisa DO†; Zervos, Marcus J. MD‡Infectious Diseases in Clinical Practice: January 2011 - Volume 19 - Issue 1 - pp 64-67 doi: 10.1097/IPC.0b013e3181eaf9cb Case Reports Abstract Author Information Legionella pneumophila is an important cause of severe community-acquired pneumonia. An unusually high frequency of L. pneumophila pneumonia has been described among patients with hairy cell leukemia; however, L. pneumophila is still underestimated and frequently remains undiagnosed among patients with this malignant disease. We describe the case of a middle-aged man who developed severe sepsis and multiorgan failure owing to L. pneumophila pneumonia in the setting of newly diagnosed hairy cell leukemia. From the *Department of Internal Medicine, †Division of Pulmonary and Critical Care Medicine and ‡Division of Infectious Diseases, Henry Ford Hospital, Detroit, MI. Correspondence to: Moises A. Huaman, MD, Department of Internal Medicine, Henry Ford Hospital, Detroit, MI. E-mail: firstname.lastname@example.org. The authors have no funding or conflicts of interest to disclose. © 2011 Lippincott Williams & Wilkins, Inc.