perivascular spaces


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perivascular spaces

Etymology: Gk, peri, around; L, vasculum, little vessel, spatium, space
spaces that surround blood vessels as they enter the brain. They communicate with the subarachnoid space. Also called Virchow-Robin spaces, Virchow's spaces.

perivascular spaces

The spaces within adventitia of larger blood vessels of the brain. They communicate with the subarachnoid space.
See also: space
References in periodicals archive ?
Enlarged perivascular spaces on MRI are a feature of cerebral small vessel disease.
Amebae invade the central nervous system through the cribriform plate and can be found in the subarachnoid and perivascular spaces.
sup][5],[6],[7],[8] Recently, High-resolution Magnetic Resonance was used to study the cerebral vessel in arteriosclerosis [sup][9], moyamoaya disease [sup][10] and CADASIL,[sup][11] microbleed and microinfarct detection in amyloid angiopathy,[sup][12] the changes of perivascular spaces and perforating arteries.
The earliest and most common abnormality found in patients with MPS is cystic lesions that correspond to enlargement of the Virchow-Robin perivascular spaces (PVS), which are arachnoidlined spaces that accompany penetrating arteries and arterioles into the brain parenchyma.
Findings include macrocrania, dilated perivascular spaces, cystic spaces in the white matter, communicating hydrocephalus, and delayed myelination.
Amebic trophozoites were present in high numbers, often located in perivascular spaces (Figure 1B), and cysts were conspicuously absent, a characteristic feature of PAM.
Perivascular spaces, occasional rosettes, and scattered aggregates of small mature lymphocytes were also seen.
The patient's brain MRI showed multiple lesions in periventricular and deep white matter and prominent perivascular spaces inconsistent with the age.