[Visceral leishmaniasis in an HIV positive patient].

Background: visceral leishmaniasis is the most serious clinical picture of leishmaniasis or kala azar. In Mexico it is a rare disease, which is a reason why it is diagnosed late concluding with patient's death most of the time. We present a clinical case of an HIV-positive male patient who developed visceral leishmaniasis, with the objective of showing the pathophysiological characteristics as well as the diagnostic approach and treatment.

[Moyamoya's disease. A case report].

Background: Moyamoya disease is a rare idiopathic non-atherosclerotic, non-inflammatory and non-amyloid cerebrovascular disease characterized by stenosis and progressive occlusion of the internal carotid artery and its branches. Upon panangiography, this abnormality is typically visualized as a cigarette smoke-like pattern due to formation of new collateral vessels. The highest incidence occurs in Asia, principally affecting women.