A Rare Case of Moyamoya Disease in a Patient With Sickle Cell Disease.

Moyamoya disease (MMD) is an infrequent progressive cerebral pathology that primarily affects the branches of the internal carotid artery, resulting in stenosis of the internal carotid artery and subsequent development of multiple collateral vessels. As the disease advances, it manifests through various clinical presentations, including stroke and seizures. Prevalence rates indicate a higher incidence among individuals of Eastern Asian descent, while it is notably less common among African Americans.