isthmus of uterus

(redirected from ostium uteri internum)


a narrow connection between two larger bodies or parts. adj., adj isth´mian.
isthmus of auditory tube (isthmus of eustachian tube) the narrowest part of the eustachian tube at the junction of its bony and cartilaginous parts.
isthmus of fauces (isthmus fau´cium) the constricted aperture between the cavity of the mouth and the pharynx.
isthmus of rhombencephalon the narrow segment of the fetal brain, forming the plane of separation between the rhombencephalon and cerebrum.
isthmus of thyroid the band of tissue joining the lobes of the thyroid.
Isthmus of thyroid gland, connecting the two lobes. From Dorland's, 2000.
isthmus of uterine tube the narrower, thicker-walled portion of the fallopian (uterine) tube closest to the uterus.
isthmus of uterus the constricted part of the uterus between the cervix and the body of the uterus.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

isth·mus of u·ter·us

an elongated constriction at the junction of the body and cervix of the uterus.
Farlex Partner Medical Dictionary © Farlex 2012

isthmus of uterus

A narrowing of the body of the uterus just above the cervix.
See also: isthmus
Medical Dictionary, © 2009 Farlex and Partners


Felix J.C., French surgeon, 1831-1920.
Guyon amputation - amputation above the malleoli, a modification of Syme amputation.
Guyon bougie
Guyon canal
Guyon catheter guide
Guyon clamp
Guyon curettage
Guyon dilator
Guyon exploratory bougie
Guyon isthmus - an elongated constriction at the junction of the body and cervix of the uterus. Synonym(s): isthmus of uterus
Guyon sign - ballottement of the kidney in cases of nephroptosis, especially when there is also a renal tumor.
Guyon sound
Guyon ureteral sound
Guyon vessel clamp
Medical Eponyms © Farlex 2012