Glioblastoma multiforme metastases to the masticator muscles and the scalp.

Glioblastoma multiforme (GBM) is the most common malignant primary brain tumor. Metastases outside the nervous system are a rare phenomenon. We present a pictographically striking case of GBM with metastases in the masticatory muscles of the infratemporal fossa and the scalp, in the context of a dense intracranial dissemination. Extracranial metastases of GBM have been reported anecdotally, while, to our knowledge, masticatory muscle metastases have been previously reported in only one case.