Jornal de Biomarcadores Moleculares e Diagnóstico

Medulloblastoma of the Cerebellopontine Angle in a Child: A Case Report and Review of the Literature

Abstract

Monique Boukobza, and Marc Polivka

Cerebellopontine angle medulloblastoma is a very uncommon presentation of medulloblastoma, especially in children. We report such a case in a 14-year-old boy. Clinical onset by acute hearing loss and MRI features were, furthermore, unusual findings. The tumour had an homogeneous signal on T1 and FLAIR sequences a high-signal intensity on diffusion-weighted images with slightly restricted ADC value (0.85 × 10³ mm²/s) and enhanced slightly and homogeneously after contrast. A subtotal removal of the tumour, followed by entire neuroaxis irradiation and chemotherapy were achieved. MRI data of the literature reported cases were reviewed. Features on conventional MRI sequences do not allow differentiating CPA medulloblastoma from other rare tumour of this location. We point out that ADC value and Spectroscopy might be useful differentiating CPA tumours, especially from ependymoma in children.