The right cerebellar tonsil extends into the foramen magnum. There is small focal [**First Name**] the posterosuperior wall of the abscess and this could indicate formation of a daughter abscess. Thinning, demineralilzation and focal dehiscence of the posterior wall of the right mastoid, concerning for spread of infection from adjacent mastoiditis. MRI of the brain would be further helpful for complete evaluation if clinically warranted. Mild hydrocephalus.