Webster's New World Medical Dictionary

jugular vein, internal
The deeper of the two
jugular veins on each side of the neck. The internal
jugular vein collects blood from the brain, the out-
side of the face, and the neck. It runs down the
inside of the neck, outside the internal and common
carotid arteries, and unites with the subclavian vein
to form the innominate vein. See also 
jugular vein.
June cold
See 
allergic rhinitis.
juvenile
Between infantile and adult. Used in
medicine to indicate onset in childhood, as in juve-
nile rheumatoid arthritis.
juvenile chronic arthritis, systemic-onset
See
arthritis, systemic-onset juvenile rheumatoid.
juvenile laryngeal papillomatosis
A condition
characterized by the emergence of numerous warty
growths on the vocal cords in children and young
adults. A baby can contract juvenile laryngeal papil-
lomatosis by being infected with the human papillo-
mavirus (HPV) during birth through the vaginal
canal of a mother who has genital warts. Treatment
usually involves surgical excision. Recurrences of
laryngeal papillomatosis are frequent. Remission
may occur after several years.
juvenile polyposis syndrome
An autosomal
dominant disorder in which polyps develop
throughout the gastrointestinal tract in the first
decade or two of life. People with the disease are at
increased risk for developing gastrointestinal can-
cers. Abbreviated JPS. There can also be diarrhea,
GI bleeding, and protein-losing from the intestinal
wall. JPS is clearly heterogeneous (more than one
entity) as regards causation. Some cases of JPS
appear sporadic with no family history of juvenile
polyposis, while other cases are due to mutations in
the MADH4 gene on chromosome 18 or the
BMPR1A gene on chromosome 10. Also known as
juvenile intestinal polyposis (JIP), juvenile polypo-
sis coli (JPC).