title: [Transitory vision loss by orbital osteoma].
abstract: The authors present a case of a 50-year-old woman with orbital osteoma complaining of gaze-evoked transitory vision loss of the right eye lasting for 6 months. The patient presented with normal visual acuity, pupils, eye movements, color vision, visual evoked potentials and visual fields. Orbital ultrasound showed a nasal intraorbitary neoformation, with low echogenicity and well-defined borders, suggesting an ethmoidal mucocele. Only a computed tomographic scan allowed the correct diagnosis, revealing a 2.7 cm x 2.2 cm calcified mass in the medial half of the right orbit, compatible with an osteoma. The x-ray view of the orbit confirmed the diagnosis. Although osteomas are slow-growing tumors, we decided to remove it because of the size, the complaints, and the patient's wishes. The tumor was approached and excised through an anterior medial orbitotomy. It was histopathologically shown to be a compact osteoma. The transitory vision loss resolved after surgery.
authors: Service d'Ophtalmologie, Hôpital Universitaire San João, Oporto, Portugal. manuelmp@portugalmail.pt
authors: M
authors: M
authors: Monteiro
authors: S
authors: S
authors: Borges
authors: V
authors: V
authors: Rosas
authors: J
authors: J
authors: Cruz
authors: C
authors: C
authors: Correia
mesh_terms: D001766:Blindness / Q000209:etiology*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009918:Orbital Neoplasms / Q000150:complications*; D010016:Osteoma / Q000150:complications*