title: Capnocytophaga sputigena primary iliopsoas abscess.
abstract: Iliopsoas abscess is usually secondary to the spread of infection from a contiguous focus. Primary disease is uncommon, except in children where Staphylococcus aureus is the main pathogen. We report a 60-year-old woman who developed a primary iliopsoas abscess as a result of haematogenous spread of Capnocytophaga sputigena from a palatal fistula and chronic sinusitis due to previous treatment for nasopharyngeal carcinoma. Pyomyositis due to unusual and fastidious Gram-negative bacilli should be considered in patients with head and neck tumours who have previously received radiotherapy.
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Jasper F W
authors.initials: JFW
authors.lastname: Chan
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Samson S Y
authors.initials: SSY
authors.lastname: Wong
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Sally S M
authors.initials: SSM
authors.lastname: Leung
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Iris W S
authors.initials: IWS
authors.lastname: Li
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Kelvin K W
authors.initials: KKW
authors.lastname: To
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Vincent C C
authors.initials: VCC
authors.lastname: Cheng
authors.affiliation: Department of Microbiology, Carol Yu Centre for Infection, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong SAR.
authors.forename: Kwok-Yung
authors.initials: KY
authors.lastname: Yuen
mesh_terms: D002206:Capnocytophaga / Q000302:isolation & purification*; D005260:Female; D005402:Fistula / Q000150:complications / Q000382:microbiology; D016905:Gram-Negative Bacterial Infections / Q000175:diagnosis* / Q000382:microbiology; D006801:Humans; D015523:Maxillary Sinusitis / Q000150:complications* / Q000382:microbiology; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000150:complications* / Q000628:therapy; D010388:Pelvis / Q000000981:diagnostic imaging; D016659:Psoas Abscess / Q000382:microbiology*; D011860:Radiography, Abdominal; D014057:Tomography, X-Ray Computed