title: Salmonella mycotic thoracoabdominal aortic aneurysm associated with chronic lymphocytic leukemia.
abstract: Non-typhoidal Salmonella infections typically cause self-limiting gastroenteritis. However, extraintestinal focal infections, including mycotic aneurysms of the aorta, can also occur. We present the case of a 71-year-old man with chronic lymphocytic leukemia (CLL) and a large type V thoracoabdominal mycotic aneurysm infected with Salmonella enteritidis, complicated by thoracolumbar spondylodiscitis, paravertebral collections, and epidural abscess. This is the first report of Salmonella aortitis in the setting of CLL, and the unusual extent of local infective invasion seen here with Salmonella enteritidis infection raises a suspicion of CLL-related immunosuppression as a direct predisposing factor. This case illustrates the need to consider the possibility of an immune defect, even in CLL patients with normal leukocyte counts. The underlying mechanisms are unclear, but are likely to involve defects in cell-mediated immunity, thought to be of particular importance in invasive infections with intracellular pathogens such as Salmonella spp.
authors: Imperial Vascular Unit, St. Mary's Hospital, Imperial College London, London, UK.
authors: Michal
authors: M
authors: Tomek
authors: Nicholas J W
authors: NJ
authors: Cheshire
authors: Nung
authors: N
authors: Rudarakanchana
authors: Dunisha
authors: D
authors: Samarasinghe
authors: Colin D
authors: CD
authors: Bicknell
mesh_terms: D000368:Aged; D000785:Aneurysm, Infected / Q000175:diagnosis / Q000276:immunology / Q000382:microbiology* / Q000628:therapy; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D017545:Aortic Aneurysm, Thoracic / Q000175:diagnosis / Q000276:immunology / Q000382:microbiology* / Q000628:therapy; D001025:Aortitis / Q000175:diagnosis / Q000276:immunology / Q000382:microbiology* / Q000628:therapy; D001027:Aortography / Q000379:methods; D019917:Blood Vessel Prosthesis Implantation; D003646:Debridement; D015299:Discitis / Q000382:microbiology; D020802:Epidural Abscess / Q000382:microbiology; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000150:complications* / Q000175:diagnosis / Q000276:immunology / Q000628:therapy; D008279:Magnetic Resonance Imaging; D008297:Male; D012307:Risk Factors; D012480:Salmonella Infections / Q000175:diagnosis / Q000276:immunology / Q000382:microbiology* / Q000628:therapy; D012477:Salmonella enteritidis / Q000302:isolation & purification*; D014057:Tomography, X-Ray Computed
chemical_list: D000900:Anti-Bacterial Agents