endolymphatic sac

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a baglike organ or structure; see also bag, pocket, and pouch.
air s's (alveolar s's) the spaces into which the alveolar ducts open distally, and with which the alveoli communicate; see also lung.
amniotic sac the sac formed by the amnion, enclosing the fetus suspended in amniotic fluid; popularly known as the bag of waters.
conjunctival sac the potential space, lined by conjunctiva, between the eyelids and the eyeball.
endolymphatic sac the blind, flattened cerebral end of the endolymphatic duct.
hernial sac the peritoneal pouch that encloses protruding intestine.
lacrimal sac the dilated upper end of the nasolacrimal duct; see also lacrimal apparatus.
yolk sac the extraembryonic membrane connected with the midgut; in vertebrates below true mammals, it contains a yolk mass.
Yolk sac in a developing embryo. From Applegate, 2000.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

en·do·lym·phat·ic sac

the dilated blind extremity of the endolymphatic duct, which lies external to the dura on the posterior aspect of the petrous part of the temporal bone.
Farlex Partner Medical Dictionary © Farlex 2012

en·do·lym·phat·ic sac

(en'dō-lim-fat'ik sak) [TA]
The dilated blind extremity of the endolymphatic duct.
Synonym(s): saccus endolymphaticus [TA] , Böttcher space.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012


Arthur, Estonian anatomist, 1831-1889.
Böttcher canal - a duct that connects the inner aspect of the utricle with the endolymphatic duct a short distance from its origin from the saccule. Synonym(s): utriculosaccular duct
Böttcher cells - cells of the basilar membrane of the cochlea.
Böttcher crystals - small crystals observed microscopically in prostatic fluid.
Böttcher ganglion - ganglion on the cochlear nerve in the internal acoustic meatus.
Böttcher space - the dilated blind extremity of the endolymphatic duct. Synonym(s): endolymphatic sac
Charcot-Böttcher crystalloids - see under Charcot


(Contugno), Domenico Felice Antonio, Italian anatomist, 1736-1822.
aqueductus cotunnii - a bony canal of the petrous portion of the temporal bone, giving passage to the endolymphatic duct and a small vein. Synonym(s): aqueduct of vestibule; Cotunnius aqueduct; Cotunnius canal
Cotunnius aqueduct - Synonym(s): aqueductus cotunnii
Cotunnius canal - Synonym(s): aqueductus cotunnii
Cotunnius disease - pain in the lower back and hip radiating down the back of the thigh into the leg now known to usually be due to herniated lumbar disk compromising the L5 or S1 root. Synonym(s): sciatica
Cotunnius liquid - the fluid contained within the osseus labyrinth. Synonym(s): liquor cotunnii; perilymph
Cotunnius space - the dilated blind extremity of the endolymphatic duct. Synonym(s): endolymphatic sac
liquor cotunnii - Synonym(s): Cotunnius liquid
Medical Eponyms © Farlex 2012

en·do·lym·phat·ic sac

(endō-lim-fatik sak) [TA]
Dilated blind extremity of endolymphatic duct, which lies external to the dura on posterior aspect of petrous part of temporal bone.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
Yamashita, "T cells infiltrating from the systemic circulation proliferate in the endolymphatic sac," The Annals of Otology, Rhinology, and Laryngology, vol.
Sando, "Postnatal development of the vestibular aqueduct and endolymphatic sac," Annals of Otology, Rhinology & Laryngology, vol.
Endolymphatic sac tumor: Case report and review of the literature.
"We generated a new mutant mouse that expresses SLC26A4 in the endolymphatic sac, but not in the cochlea or the vestibular organs of the inner ear," Wangemann said.
Ion transport its regulation in the endolymphatic sac: suggestions for clinical aspects of Meniere's disease.
Moreover, the increased levels of IgA in the epithelial cells of the inner ear and in the endolymphatic sac has been demonstrated, with inflammatory conditions.
Localization of nitric oxide synthase isoforms (I, II and III) in the endolymphatic sac of the guinea pig.
The pathologic findings include multiple HABs (usually retinal, cerebellar, or spinal), RCC, pheochromocytoma, islet cell tumors of the pancreas, endolymphatic sac tumors of the inner ear, and papillary cystadenomas of the epididymis or broad ligament, as well as cysts and other benign neoplasms of the pancreas, kidney, and liver.
The term "secondary hydropic ear disease" describes the conditions that cause hydrops of the inner ear secondarily (such as endolymphatic sac tumors).
In our study, the median for disyllabic speech understanding after surgery was 78% for patients who underwent ablative procedure [gentamicin, n=2; surgical (labyrinthectomy, n=3 or endolymphatic sac drainage, n=3)] and 76% for patients who were only managed with medical treatment (p=0.975).
Endolymphatic sac tumor (ELST) is a papillary epithelial neoplasm arising within the endolymphatic sac/ duct that shows a high association with von Hippel-Lindau disease (VHL).