eng Science and Education Publishing American Journal of Medical Case Reports 2374-216X 2018-12-10 6 11 224 225 10.12691/ajmcr-6-11-2 AJMCR20186112 article Hira Chaudhary 1 Mohammed Al-Sadawi 1 Iya Dubson 2 Apoorva Jayarangaiah 3 Samy I. McFarlane Samy.mcfarlane@downstate.edu 3 Department of Internal Medicine, State University of New York, Downstate Medical Center, Brooklyn, New York, United States-11203 Department of Internal Medicine, NYC-HHC Kings County Hospital Center, Brooklyn, New York, United States-11203 Department of Internal Medicine, NYC Health and Hospitals/Jacobi Medical Center, Bronx, New York, U.S.A-10461 Psoas abscess is a rare clinical entity that requires early diagnosis and timely intervention to avoid serious complications of the disease. We report a case of psoas abscess that presented initially as low back pain then complicated with septic arthritis. We discuss the clinical diagnosis, intervention and follow up of the case along with review of the literature. This important clinical entity that generally presents with vague signs and symptoms leads to a delay in diagnosis and timely intervention. http://pubs.sciepub.com/ajmcr/6/11/2/ajmcr-6-11-2.pdf Psoas abscess septic arthritis chronic low back pain