Granulomatous amebic encephalitis (GAE), or meningoencephalitis due to Acanthamoeba spp. and leptomyxid ameba are uncommon CNS infections that generally occur in immunocompromised hosts. We describe a case of GAE caused by Balamuthia mandrillaris previously designated as a leptomyxid ameba, in an apparently healthy 14-year-old Venezuelan boy. This case was… (More)
A sural nerve dissected from a recently dead patient displayed an unusual X-ray diffraction pattern, suggesting that in situ and at the time of the patient's death the myelin sheaths were in a swollen state. Diffraction patterns of the swollen type were also recorded from: (1) a sural nerve from the corpse of a neurologically healthy person after soaking… (More)
Adult polyglucosan body disease is a recently established clinicopathological entity, with few cases reported in the literature. In this paper we describe a case of a 46-year-old man who had died to a pancreatic cancer whose neuropathological study revealed a massive accumulation of polyglucosan bodies in the cerebral white matter, brainstem, cerebellum and… (More)
Coinfections with human immunodeficiency virus (HIV) and infectious agents have been recognized since the early 90s. In the central nervous system (CNS) of HIV(+) patients, parasitic protozoans like Toxoplasma gondii have been described as responsible for the space occupying lesions (SOL) developed. However, the involvement of Trypanosoma cruzi is also… (More)
INTRODUCTION Meningiomas are frequent primary neoplasms of the central nervous system, usually benign and susceptible to healing through surgery. The histological grade of the WHO and the extension of the initial surgical resection are determining prognostic factors in these tumors. Nevertheless, a recurrence rate close to 20 % in benign meningiomas… (More)
An unusual lesion, a solitary plasmacytoma of the falx cerebri is reported. Surgical treatment and subsequent radiotherapy have been effective therapeutic modalities with no signs of recurrence or disseminated disease after two and a half years.