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Revista chilena de radiología

versión On-line ISSN 0717-9308

Resumen

LARA G., Javier et al. Cerebellopontine meningeal melanocytoma: Keys for imaging diagnostic approach. Rev. chil. radiol. [online]. 2020, vol.26, n.3, pp.113-116. ISSN 0717-9308.  http://dx.doi.org/10.4067/S0717-93082020000300113.

Cerebellopontine angle tumors (CPA) represent approximately 6 to 10% of intracranial tumors. Vestibular Schwannomas and meningiomas are the most common, however up to 15% can be of other origin, including from melanocytes derived from the neural crest. The differential diagnosis of CPA pathologies is extensive, always taking into account the most common ones. However, if the radiological characteristics are not the expected, the approach should be directed towards unusual lesions, putting into context the different cell lines that can give rise to the neoplasm at this location, such as melanotic neoplasms. We present a case of a 74-year-old male, who presented with a cerebellar syndrome. Due to an atypical clinical evolution, a contrast enhanced head MRI was performed, revealing a dural based tumor on the left CPA, which was hyperintense on T1 and hypointense on T2 weighted sequences, which is not expected from the common lesions at this region and suggested it’s melanotic content.

Palabras clave : Cerebellopontine angle; Magnetic resonance imaging; Melanin; Neoplasm.

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