What is a perivascular cyst?
Perivascular spaces (PVSs), also known as Virchow-Robin spaces, are pial-lined, fluid-filled structures found in characteristic locations throughout the brain. They can become abnormally enlarged or dilated and in rare cases can cause hydrocephalus.
What causes Virchow-Robin space?
[3,4,5] Extreme unilateral dilation of Virchow-Robin spaces may also be encountered. [6] Large Virchow-Robin spaces (VRS) have been associated with age, dementia, multiple sclerosis, trauma, hypertension, and incidental white matter lesions.
Where is the perivascular located?
Perivascular spaces are most commonly located in the basal ganglia and white matter of the cerebrum, and along the optic tract. The ideal method used to visualize perivascular spaces is T2-weighted MRI. The MR images of other neurological disorders can be similar to those of the dilated spaces.
What is Robin Virchow space?
Virchow-Robin spaces are perivascular fluid-filled cavities that surround perforating arteries and veins in the brain parenchyma. As a rule in healthy people they are approximately 5 mm in diameter. Typical localizations are brainstem ganglia, mesencephalon and the white matter of the brain.
What is T2 and flair hyperintensities?
Focal hyperintensities in the subcortical white matter demonstrated by T2-weighted or FLAIR images are a common incidental finding in patients undergoing brain MRI for indications other than stroke. They are indicative of chronic microvascular disease.
What are perivascular spaces in basal ganglia?
Perivascular spaces (PVS) are interstitial fluid-filled cavities surrounding small perforating vessels in the brain.
What is perivascular inflammation?
Perivascular inflammation is a prominent pathologic feature in most animal models of pulmonary hypertension (PH) as well as in pulmonary arterial hypertension (PAH) patients.
What does the word perivascular mean?
Medical Definition of perivascular : of, relating to, occurring in, or being the tissues surrounding a blood vessel.
How useful is CT in the diagnosis of submandibular cystic lesions?
A retrospective analysis of 35 submandibular cystic lesions was undertaken to assess the usefulness of CT in their differential diagnosis. Lesions were analysed on the basis of extent, shape and density. It was found that all those lesions that extended into both the sublingual and the anterior part …
What is the difference between a cyst and sub capsular parenchyma?
Fluid sac: A cyst is a fluid filled sac anywhere in the body. They are benign. Sub capsular means under the kidney capsule (surface). Parenchyma means in the kidney substance. They may be very small-finger tip sized, or can be as large as the whole kidney.
What is the difference between lateral cervical cysts and Ranulas?
It was found that all those lesions that extended into both the sublingual and the anterior part of the submandibular spaces could be diagnosed as ranulas (10/10) and all those limited to the posterior part as lateral cervical cysts (8/8).
What are sub capsular and parenchyma in the kidney?
They are benign. Sub capsular means under the kidney capsule (surface). Parenchyma means in the kidney substance. They may be very small-finger tip sized, or can be as large as the whole kidney. They may enlarge with time. Generally they don’t cause symptoms but should be followed over the years due to small risk of cancer or kidney injury.