title: [Monoarthritis of the elbow revealing an intraarticular osteoid osteoma].
abstract: BACKGROUND
  Osteoid osteoma is one of the unusual causes of musculoskeletal pain. Its diagnosis is usually not difficult in classic diaphyseal localization. However, the diagnosis of juxta or intraarticular osteoid osteoma is challenging because of atypical clinical presentation responsible for long diagnosis delay.
  
  
  OBJECTIVE
  Report a new case.
  
  
  METHODS
  We report herein the case of a 22-year-old woman presenting an intraarticular osteoid osteoma of the elbow. Diagnosis has been established on imaging findings (MRI and CT-scan) after 10 months because of atypical clinical presentation as a chronic monoarthritis of the elbow. The picture of an osteoid osteoma of the lower extremity of the humerus associated to a synovitis and a joint effusion was suspected on MRI. It had been confirmed on CT-scan wich showed the nidus. Surgical removal of the tumor allowed pain relief and functional restoration in postoperatively.
  
  
  CONCLUSIONS
  Regarding an unexplained chronic monoarthritis, the diagnosis of intraarticular osteoid osteoma should be evoked. CT-can remains the investigation of choice for identifying the nidus. Surgical exicision permits the relief of symptoms.
authors.affiliation: Service de rhumatologie, Hôpital Charles Nicolle, Tunis, Tunisie.
authors.forename: Leila
authors.initials: L
authors.lastname: Cheikhrouhou Abdelmoula
authors.forename: Khadija
authors.initials: K
authors.lastname: El Manaa
authors.forename: Chiraz
authors.initials: C
authors.lastname: Ben Hadj Yahia
authors.forename: Houda
authors.initials: H
authors.lastname: Ajlani
authors.forename: Hammadi
authors.initials: H
authors.lastname: Lebib
authors.forename: Lilia
authors.initials: L
authors.lastname: Chaabouni
authors.forename: Rafik
authors.initials: R
authors.lastname: Zouari
mesh_terms: D001168:Arthritis / Q000209:etiology*; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000601:surgery; D005260:Female; D006801:Humans; D006811:Humerus / Q000473:pathology* / Q000601:surgery; D008279:Magnetic Resonance Imaging; D010017:Osteoma, Osteoid / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D055815:Young Adult