Unusual bifrontal cerebral infarction related to pituitary apoplexy. An uncommon presentation and literature review.

Background: Pituitary apoplexy (PA) is a syndromic condition described in 1950. The main symptoms are headache, visual impairment, ophthalmoplegia, and hypopituitarism. The relationship between stroke and PA is uncommon and two mechanisms are described: vascular compression and vasospasm.

Immunocompetent patient with isolated primary fourth ventricle lymphoma. Unusual diagnosis, their pitfalls, and challenges.

Background: Primary central nervous system lymphoma (PCNSL) is an uncommon lesion and represent 4% of all central nervous system (CNS) cancers. There have been few reports of localized isolated lymphoma developing in the fourth ventricle, with only 8 previous cases described. We present a case of an immunocompetent patient with isolated fourth ventricle lymphoma who did not have diffusion-weighted imaging (DWI) restriction.

Pure endoscopic transsphenoidal treatment of skull base ameloblastoma with intracranial extension: Case report and literature review.

Background: Ameloblastoma is a benign locally invasive lesion that represents 1% of all oral tumors. Epidemiological characteristics are variable in the literature. The most common origin sites are mandible and maxilla.