Does anyone know what is virchow spaces?and does meningitis causes petechiae in the brain?
Virchow-Robin spaces are spaces (often only potential) that surround blood vessels for a short distance as they enter the brain. In advanced or fulminant cases of cryptococcal meningitis, the yeast invades the brain parenchyma along the Virchow-Robin spaces. but it’s not a case of where there is one there has to be the other! Their wall is formed by prolongations of the pia mater. Virchow-Robin spaces are invaginations of the subarachnoid space into the brain associated with leptomeningeal vessels; these are extensions of the subarachnoid spaces in the form of a sheath of pial cells that surround small arterial and partly also venous vessels down to the capillary level. This sheath divides the subarachnoid space into an inner section (between vessel and pia) that takes the role of extracerebral lymphatic drainage, and an outer part (between pia and arachnoid). Dilated perivascular spaces occur in characteristic locations, typically in the basal ganglia, around the atria, near the anter
