title: [Psammous desmo-osteoblastoma of the right maxilla. Case report and differential diagnosis of a rare tumor].
abstract: METHODS
  We report the case of a 9-year-old female patient with a moderate swelling of the right maxilla. A tumor was diagnosed by conventional X-ray within the region of tooth 17 in the right tuber maxillae. The histological diagnosis after biopsy of the lesion was "fibrous dysplasia Jaffe-Lichtenstein". One year later, the tumor was still growing, and computed tomography was carried out. The first histological diagnosis was confirmed by another biopsy; the differential diagnosis was "ossifying fibroma". In the following years, the tumor grew and expanded into the right orbit and maxilla. Four years after the first diagnosis the tumor was removed operatively.
  The histology showed round, partially trabecular or calcified bodies, known as psammoma-like ossicles. Therefore, in light of the clinical course and the radiographic appearance, the correct diagnosis was "psammous desmo-osteoblastoma".
  
  
  CONCLUSIONS
  The psammous desmo-osteoblastoma and its differential diagnosis are discussed in this article.
authors.affiliation: Referenzzentrum für Knochenkrankheiten, Pathologisches Institut, Universität Freiburg im Breisgau.
authors.forename: C P
authors.initials: CP
authors.lastname: Adler
authors.forename: M
authors.initials: M
authors.lastname: Neuburger
authors.forename: G W
authors.initials: GW
authors.lastname: Herget
mesh_terms: D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008437:Maxilla / Q000473:pathology / Q000601:surgery; D008441:Maxillary Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D009361:Neoplasm Invasiveness; D018215:Osteoblastoma / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed