[ XXXX in the inner auditory canal].

@entity1 @entity129 @entity5513 @entity2167 @entity5 @entity2103 @entity1653 @entity392 @entity3 @entity3541 @entity393 @entity2287 @entity420
@entity3 in the inner auditory canal (IAC), or more precisely in the pontocerebellar angle (PCA) is extremely rare. Indeed @entity5513 ( @entity5513 ), @entity1653 and other types of benign neoformations, in decreasing order, account for nearly all expansive pathologies in this anatomical region. The present paper reports a clinical case of a @entity1 with the sudden onset of an @entity393 in the right ear. This @entity393 was promptly followed by @entity3541 . The function of both @entity129 worsened progressively and rapidly. Cerebral radiology, performed with MRI and the administration of @entity2287 , showed a @entity5513 -compatible neoformation fundamentally affecting the IAC. However, histological tests performed after surgery indicated an @entity420 . Post-operative instrumental tests identified the primary @entity5 in the lower lobe of the right lung. The purpose of this work was to highlight, in view of the literature on the topic, the main clinical aspects to consider when a malignant expansion is suspected in the PCA. Naturally there is greater basis for such suspicion when a primary @entity5 has previously been diagnosed. Generally @entity5513 progresses quite gradually, in line with an extremely slow growth rate. Therefore it is normally seen in a progressive worsening of hearing, @entity392 and equilibrium disorders. Appearance of a @entity2103 is strictly limited to relatively large @entity5 and is encountered at a later stage. This is why a rapid progression of @entity2167 accompanied, or promptly followed, by complete @entity3541 must alert one to the possibility of a @entity5 . Imaging does not permit easy pre-operative diagnosis since the radiological signs and morphologies are often quite similar to those produced by @entity5513 . Therefore, post-operative histological examination can hold some surprises.
