title: Ultrasound detection of a subperiosteal abscess secondary to coalescent otomastoiditis.
abstract: We report the unusual ultrasound appearance of coalescent otomastoiditis with subperiosteal abscess in a 3-month-old boy with a 1-week history of an enlarging lump behind the left ear. Ultrasound examination of the lump revealed subcutaneous oedema with an abscess extending from a defect in the cranial vault as a result of extension of the inflammatory process. We believe that this sonographic appearance has not been previously described in the published literature.
authors: Department of Medical Imaging, Women's and Children's Hospital, Adelaide, South Australia 5006, Australia. drrobyngrant@hotmail.com
authors: R L
authors: RL
authors: Grant
authors: L
authors: L
authors: Piotto
mesh_terms: D000038:Abscess / Q000000981:diagnostic imaging* / Q000382:microbiology; D000208:Acute Disease; D003937:Diagnosis, Differential; D006801:Humans; D007223:Infant; D008297:Male; D008417:Mastoiditis / Q000000981:diagnostic imaging* / Q000382:microbiology; D010033:Otitis Media / Q000382:microbiology; D010522:Periostitis / Q000000981:diagnostic imaging* / Q000382:microbiology; D013290:Streptococcal Infections / Q000000981:diagnostic imaging*; D013296:Streptococcus pneumoniae / Q000302:isolation & purification; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography