title: A rare case of osteoma in the frontal sinus: anatomical and histological description.
abstract: OBJECTIVE
  The purpose of this paper is to present a rare case of osteoma localized in the left frontal sinus. A 22-year-old woman who arrived at the Department of Neurosurgery of the University Emergency Hospital, Bucharest, Romania, presented a vertical asymmetry of the eyeballs but displayed no clinical signs like pain or diplopia. The computer tomography exam was used for preoperatory diagnostic. Histopathology was performed after surgery using Hematoxylin and Eosin staining. The Nikon Eclipse microscope was used to examine the slides.
  
  
  RESULTS
  The histopathology exam shows a compact osteoma with dense and non-Haversian bone tissue and parallel bony trabeculae. A few spaces for the marrow were also found. The osteocytes were small and no fibrous cells were discovered.
  
  
  CONCLUSIONS
  The computer tomography and histopathology exam were the investigations that lead us to a true diagnostic of dense osteoma. This tumor was the first case of frontal sinus osteoma histologically described in the Romanian population.
authors.affiliation: Department of Preventive Dentistry and Endodontics, Faculty of Dental Medicine, "Titu Maiorescu" University, Bucharest, Romania; mihaela.raescu@gmail.com.
authors.forename: Cristian
authors.initials: C
authors.lastname: Funieru
authors.forename: Bogdan
authors.initials: B
authors.lastname: Bănică
authors.forename: Cristian-Niky
authors.initials: CN
authors.lastname: Cumpătă
authors.forename: Ruxandra Ionela
authors.initials: RI
authors.lastname: Sfeatcu
authors.forename: Adina Mihaela
authors.initials: AM
authors.lastname: Dumitrache
authors.forename: Mihaela
authors.initials: M
authors.lastname: Răescu
authors.forename: Ionela Teodora
authors.initials: IT
authors.lastname: Dascălu
authors.forename: George
authors.initials: G
authors.lastname: Simion
authors.forename: Mihaela Jana
authors.initials: MJ
authors.lastname: Ţuculină
mesh_terms: D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D005260:Female; D005626:Frontal Sinus / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007430:Intraoperative Care; D010016:Osteoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D055815:Young Adult