Anastomosis

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Related to anastomosing: arterial anastomosis

anastomosis

[ə‚nas·tə′mō·səs]
(medicine)
A surgical communication made between blood vessels, for example, between the portal vein and the inferior vena cava.
An opening created by surgery, trauma, or disease between two or more normally separate spaces or organs.
(science and technology)
The union or intercommunication of parts or branches, such as blood vessels, streams, or leaf veins. Also known as inosculation.
A network of parts or branches created by the process of anastomosis.

Anastomosis

 

in animals, connections between nerves, muscles, and blood or lymphatic vessels. Anastomoses between arteries and veins, without the formation of capillary networks—that is, arteriovenous anastomoses—are of importance in regulating the blood supply of organs. In clinical practice, anastomosis is the name given to a connection between tubular organs which is artificial or has arisen as a consequence of disease. In higher plants, anastomosis is the connecting of tubular structures—for example, veins in leaves and branchings of latex vessels. In fungi, anastomosis is the connecting or concresence of two mycelium hyphae with the establishing of intercommunication between them. This occurs with an insufficiency of food and plays a role in the formation of diploid mycelium and the heterokaryon of haploid mycelium, since the cell nuclei move from one cell into another through the anastomoses.

References in periodicals archive ?
Microscopically, at low-power magnification the tumors were composed of a compact anastomosing capillary network supported in the edematous and myxoid background (Figure 2, A).
Current data indicate that this secondary modification of the pelvic kidney collecting ducts is restricted to salamanders with the complex anastomosing pelvic kidney morphology; however, it must be recognized that kidneys from seasonal collections of salamanders exhibiting the nonanastomizing kidney morphology have not yet been investigated.
The architectural patterns were quite variable from region to region, with neoplastic cells lining microcystic structures (Figure 1, A) or pseudoacini, or arranged in trabeculae or cords, anastomosing in a plexiform or filigree pattern (Figure 1, B).
6) Splenic hamartoma or splenoma is a well-circumscribed red pulp-only lesion that consists of anastomosing sinusoidal channels containing irregular lumina and cystlike spaces.
A welldifferentiated angiosarcoma can be ruled out by the absence of nuclear pleomorphism and hyperchromatism, mitotic activity, or a freely anastomosing sinusoidal pattern.
The lesion exhibited a predominantly trabecular architectural pattern consisting of anastomosing cords and bands of tumor cells (Figure 3, original magnification x20).
The surgeries were completed in 15 categories that included wedge resection of liver, removal of idiopathic cysts from liver, gall bladder surgery, enucleation of the hemangioma of the liver, appendectomy, ovarian cyst removal, removal of the fibromyoma of the uterus, pancreatocystoenterostomy, puncture biopsy of pancreas, pericystectomy, open echinococcectomy, anastomosing hollow organs and inter-organ anastomoses.
Anastomosing vascular channels lined with remarkably atypical endothelial cells herald angiosarcoma, which is rare in infants.
The principal exploration target is gold associated with pervasive alteration zones and/or discontinuous swarms and anastomosing quartz veins in major shear zones.