adventitial

It is continuous with the outer adventitial layer of the neighboring great blood vessels.

In the adventitial layer there was an abundance of collagen fibrils.

There is an adventitial inflammatory infiltrate.

Additionally, there was a left hemothorax of eight hundred cc and a massive aortic adventitial hemorrhage."

Histological examination shows medial hypertrophy and adventitial fibrosis.

With the advent of newer, non-invasive imaging techniques, the origin of other, so-called adventitial sounds or heart clicks has been appreciated.

BRVO typically occurs at arteriovenous crossings, where the artery and vein share a common adventitial sheath.

Measured in millimeters, it is defined as the retroperitoneal or peritoneal adventitial soft-tissue margin closest to the deepest penetration of tumor.

These results in a severe vasoconstriction and smooth muscle and adventitial hypertrophy characteristic of patients with PAH.

In patients who do live long enough to be seen in a hospital, a majority have only a partially torn blood vessel, with the outermost adventitial layer still intact.

Interestingly, T-cadherin is highly expressed in adventitial vasa vasorum of injured arteries suggesting the involvement of Т-cadherin in the processes of angiogenesis after vessel injury.

This leads to attraction and activation of monocytes and T-cells into the adventitial space (peripheral collateral vessels) or attachment of these cells to the endothelium (coronary collaterals).

Depending on the type of vasa vasorum, it penetrates the vessel wall starting at the intimal layer (vasa vasorum interna) or the adventitial layer (vasa vasorum externa).

In regards to his discovery of "Kupffer cells" in 1876, he initially suggested that this type of cell belonged to a group of perivascular cells of the connective tissues or to the adventitial cells (pericytes).

Meningoencephalitis characterized by perivascular cuffing with proliferating adventitial cells, histiocytes, and a few plasma cells was seen in the gray and white matter of the cerebrum and in the leptomeninges of PPV-infected stillborn pigs.

It has recently been proposed that cystic adventitial disease, in which a cyst occurs within the popliteal artery near the knee, may occur by an articular mechanism, with a conduit leading from the joint, similar to the development of ganglion cysts that spread within the peroneal nerve.

In arteriovenous sheathotomy an incision is made in the adventitial sheath adjacent to the arteriovenous crossing and is extended along the membrane that holds the blood vessels in position to the point where they cross, the overlying artery is then separated from the vein.