[Arachnoid cysts. Historical evolution of the concept and pathophysiological theories]. / Quistes aracnoideos. Evolución histórica del concepto y teorías fisiopatológicas.

ABSTRACT

Arachnoid cysts of central nervous system are benign collections filled with a liquid that is equal o similar to cerebrospinal fluid, coated with a single layer or flattened arachnoid cells membrane, congenital or secondary to trauma, meningitis or hemorrhage. First described by Bright in 1931, its definition and possible pathophysiology has been debated to date. Our objective is to present a summary of this process.