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resembling a net.
reticular activating system the system of cells of the reticular formation of the medulla oblongata that receive collaterals from the ascending sensory pathways and project to higher centers; they control the overall degree of central nervous system activity, including wakefulness, attentiveness, and sleep; abbreviated RAS.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Resembling a net or network.
[L. rete, network]
Farlex Partner Medical Dictionary © Farlex 2012


Resembling a net or network.
[L. rete, network]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
The retiform variant of SLCT histologically resembles the rete testes and is comprised of dilated and tortuous tubules with a "staghorn-like" appearance (Figure 3).
While SLCTs have been reported in females ranging in age from 1 to 84 years, with a mean age of 25 years at diagnosis, the average age at diagnosis for retiform SLCT is much younger at 15 years [1, 3].
It should be considered in any patient with a history of cocaine use who present with the tetrad of retiform purpura involving the ear and nose, arthralgia, neutropenia, and high-titer ANCA positivity (17).
Noninflammatory retiform purpura is an important sign of cutaneous microvascular occlusion.
Retiform parapsoriasis, however, progresses "to cutaneous T-cell lymphoma in almost 100% of cases.
Some tumors, especially those with heterologous or retiform components, are cystic and the former may mimic a mucinous cystic tumor.
There were also papillary configuration and tufts of capillaries with hobnail pattern or match stick pattern [Figure 3, 5, 6 & 7], suggesting that there is an overlap of cavernous haemangioma with retiform haemangioendothelioma.
The retiform type of haemangioendothelioma, a low-grade variant for angiosarcoma, usually occurs in the distal extremities of the young.
(6,7) All of these can present clinically with palpable, retiform purpura similar to that seen in levamisole-induced vasculitis.
(190,202,203,215,216) The use of FOXL2 is limited, since it is not expressed in approximately half of the cases of Sertoli-stromal tumors, particularly the retiform variant.
(13) In addition, virtually all subtypes of hemangioendotheliomas were positive for ERG, including kaposiform hemangioendotheliomas, retiform hemangioendotheliomas, and epithelioid hemangioendotheliomas.
These include: (1) tubular pattern with small, round, uniform, and back-to-back tubules, lined by cuboidal to flat cells; (2) ductal pattern typically composed of large glands with variable size, occasionally with intraglandular villous papillae and cellular budding, the glands being lined by 1 to several layers of columnar cells with endometrioid-like appearance; (3) retiform growth characterized by slitlike branching glands, some with intraglandular papillae lined by 1 to several layers of flat, cuboidal, or columnar cells; slit-like and cystic spaces may merge and impart a sievelike appearance; (4) solid pattern with nests and sheets of epithelial cells with scattered small glands; and (5) sex cordlike growth.