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hydatid |
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hydatid /hy·da·tid/ (hi´dah-tid) 1. hydatid cyst. 2. any cystlike structure. hydatid of Morgagni 1. a cystlike remnant of the müllerian duct on the upper end of the testis. 2. one of the small pedunculated structures attached to the uterine tubes near their fimbriated end; remnants of the mesonephric ducts. sessile hydatid h. of Morgagni (1).
hydatid [hī′dətid] Etymology: Gk, hydatis, water drop a cyst or cystlike structure that usually is filled with fluid, especially the cyst formed around the developing scolex of the dog tapeworm Echinococcus granulosus. Humans and sheep can become hosts to the larval stage by ingesting the eggs. Hydatid cysts may be identified by palpation. They occur most commonly in the liver. An acute anaphylactoid allergic reaction may occur if the cyst ruptures. See also hydatid cyst, hydatid mole, hydatidosis. hydatic, adj. hydatid 1. a hydatid cyst. 2. any cyst-like structure. hydatid cyst the larval stage of the tapeworm Echinococcus granulosus or E. multilocularis, containing daughter cysts, each of which, if fertile, will have many protoscoleces; it is the cause of hydatid disease. Called also Echinococcus cyst and hydatid. hydatid disease an infection in humans, sheep, cattle, pigs and horses, and occasionally in many other mammal species. The infection is usually of the liver or lungs, caused by larval forms (hydatid cysts) of tapeworms of the genus Echinococcus, and characterized by the development of expanding cysts. In the infection caused by E. granulosus, single or multiple cysts that are unilocular in character are formed, and in that caused by E. multilocularis, the host's tissues are invaded and destroyed as the cyst(s) enlarge by peripheral budding. Called also echinococcosis. false hydatid see cysticercustenuicollis. Morgagni's hydatid see morgagni's hydatid. sessile hydatid the hydatid of Morgagni connected with a testis. stalked hydatid the hydatid of Morgagni connected with an oviduct. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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