See Also: Congenital bilateral absence of vas deferens(health)
positional vertigo of Barany(medicine)
benign positional vertigo(medicine)
Benign paroxysmal positional vertigo (BPPV)(health)
BPPV (benign paroxysmal positional vertigo)(health)
congenital absence of pulmonary valve(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
positional(dictionary)
Vas deferens(medicine)
Positional(medicine)

positional vertigo of Barany (medicine) and Congenital bilateral absence of vas deferens (health)


positional vertigo of Barany (medicine)


positional vertigo of Barany -->
benign positional vertigo
Brief attacks of paroxysmal vertigo and nystagmus that occur solely with certain head movements or positions, e.g., with neck extension; due to labyrinthine dysfunction.

Synonym: positional vertigo of Barany, postural vertigo.


Congenital bilateral absence of vas deferens (health)


A condition in males when the tubes that carry sperm from the testes (the vas deferens) fail to develop normally. The testes usually develop and function normally and the men have normal sexual performance, but sperm cannot be transported through the male reproductive system. Men with congenital bilateral absence of vas deferens are therefore infertile (unable to conceive a child). This condition is responsible for 2 to 5% of all infertility in men. Congenital bilateral absence of vas deferens is due to mutations in the CFTR gene (the cystic fibrosis transmembrane conductance regulator gene) which encodes a protein that functions as a channel across the cell membrane.