Aggressive osteoblastoma with degeneration to secondary aneurysmal bone cyst

• Autor(a) principal: Duarte,Marcio Luís
• Data de Publicação: 2019
• Outros Autores: Prado,José Luiz M. A., Pereira,Carlos Alexandre M., Alves,Maria Teresa S., Scoppetta,Luiz Carlos D.
• Tipo de documento: Relatório
• Idioma: eng
• Título da fonte: Jornal Brasileiro de Patologia e Medicina Laboratorial (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442019000400426
• topic: bone cysts; bone neoplasms; magnetic resonance imaging

ABSTRACT A 4-year-old male patient presented with headaches that started 18 months ago and were associated with progressive loss of balance and difficulty walking. Magnetic resonance imaging (MRI) demonstrated an expansile extra-axial mass lesion in the posterior aspect of the posterior fossa on the left, compressing the adjacent brain, as well as the cerebellar hemispheres; it also distorts the fourth ventricle with severe obstructive hydrocephalus upstream. Histological evaluation diagnosed aggressive osteoblastoma with a secondary aneurysmal bone cyst of the skull. We report a case of aggressive osteoblastoma in which the lesion in the MRI was mimicking brain tumor or intracranial primary tumor rather than primary bone tumor.