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 ?
Histologically, there are anastomosing networks of blood vessels with highly atypical spindled cells that show enlarged, irregular hyperchromatic nuclei.
All of the cases described in those two series consisted of unilocular cysts, filled with lamellar keratin and exhibited minute, peripheral, anastomosing epithelial cords.
The tumors demonstrated either dense anastomosing sinusoid-like vasculature (Figure 2, D) with scant chronic inflammatory cells or a central large "feeding" vessel surrounded by capillary-type vessels with swollen endothelium (Figure 2, E).
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 histological features of ESFA are diagnostic and include multiple thin anastomosing cords and strands of benign appearing epithelial cells which are connected to the undersurface of the epidermis and with or without formation of lumina which is embedded in a loose fibrovascular stroma.
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).
The anastomosing and disorganized vascular sinusoidal channels produced irregular blood-filled lumina lined by tall and plump endothelial-like cells that contained vesicular nuclei and small nucleoli.
The surgeon's comment: "The Tissue Bonding technology techniques enable the surgeon to reliably bond the large intestine, and to do a hemostatic bond before anastomosing and bringing the intestine down, without application of needles, sutural materials, staples or other foreign matter.
Staplers Used in Anastomosis are Linear cutting staplers (TLC 55, 75), Linear anastomosing staplers (TCR 55, 75), Circular anastomosing staplers (CDH 25, 29)
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.