title: Orbital rhabdomyosarcoma presenting as an apparent orbital subperiosteal abscess.
abstract: We present a patient with acute sinusitis whose CT scan showed a ring-enhancing lesion within the orbit typical of an orbital subperiosteal abscess. On exploration of the orbit, there was no pus present but a tumour was found, which on histological examination was found to be a rhabdomyosarcoma. The clinical signs and CT characteristics of orbital subperiosteal abscesses and rhabdomyosarcomas are discussed. A ring-enhancing lesion within the orbit on CT scan should not be regarded as being pathognomonic for a subperiosteal abscess and the possibility of other diagnoses should be considered.
authors.affiliation: Department of Otorhinolaryngology, Faculty of Health Sciences, University of the Orange Free State, PO Box 339, Bloemfontein, South Africa. gnolrs@med.uovs.ac.za
authors.forename: R Y
authors.initials: RY
authors.lastname: Seedat
authors.forename: P D
authors.initials: PD
authors.lastname: Hamilton
authors.forename: L P
authors.initials: LP
authors.lastname: de Jager
authors.forename: W
authors.initials: W
authors.lastname: Strydom
authors.forename: C A
authors.initials: CA
authors.lastname: Beukes
mesh_terms: D000038:Abscess / Q000175:diagnosis* / Q000188:drug therapy; D000900:Anti-Bacterial Agents; D001707:Biopsy, Needle; D002675:Child, Preschool; D003937:Diagnosis, Differential; D004359:Drug Therapy, Combination / Q000627:therapeutic use; D006801:Humans; D008297:Male; D009916:Orbital Diseases / Q000175:diagnosis*; D009918:Orbital Neoplasms / Q000175:diagnosis / Q000473:pathology; D011008:Pneumococcal Infections / Q000175:diagnosis* / Q000188:drug therapy; D012208:Rhabdomyosarcoma / Q000175:diagnosis* / Q000473:pathology
chemical_list: D000900:Anti-Bacterial Agents