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
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).
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
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.