Primary central nervous system lymphoma is a rare condition which commonly presents in immunosuppressed patients.We present the case of a 38 year old female with no relevant previous medical history who underwent surgery for the removal of a mass located in her left cerebello pontine angle. Final pathology report was consistent with B – cell lymphoma (large cell variant). A survey for hidden conditions which could predispose the patient to immunodeficiency was negative. The age of presentation for this case was also atypical. Further genetic and molecular testing could provide a possible explanation for this rare event.El linfoma primario del sistema nervioso central es una neoplasia rara que se encuentra con relativa frecuencia en paciente...