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Achondrogenesis type II
Achondrogenesis type II Severe inherited disorder of bone growth characterized by a short body and limbs and a lack of bone formation in the spine and pelvis.
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Bone
Bone refers either to a hardened connective tissue or to one of the individual structures, or organs, into which it is formed, found in many animals. Bones support body structures, protect internal organs, and (in conjunction with muscles) facilitate movement; are also involved with cell formation, calcium metabolism, and mineral storage. The bones of an animal are, collectively, known as the skeleton.
Spine
A column in the body consisting of 33 vertebrae.
Pelvis
A basin-shaped structure that supports the spinal column and contains the sacrum, coccyx, and hip bones (ilium, pubis, and ischium).
SIMILAR TERMS--------------------------------------
Acholeplasma
A genus of gram-negative organisms including saprophytic and parasitic or pathogenic species.
Acholeplasma laidlawii
An organism originally isolated from sewage, manure, humus, and soil, but recently found as a parasite in mammals and birds.
Acholeplasmataceae
Gram-negative organisms including apparently free-living saprophytes as well as mammalian and avian parasites, and possibly pathogens.
Achondrogenesis
A genetic disorder of bonwe resulting in short-limbed dwarfism. There are a number of different types of achondrogenesis. See: Achondrogenesis type II.
Achondroplasia
An inherited form of short-limbed dwarfism.
Achondroplasias
An autosomal dominant disorder that is the most frequent form of short-limb dwarfism. Affected individuals exhibit short stature caused by rhizomelic shortening of the limbs, characteristic facies with frontal bossing and mid-face hypoplasia, exaggerated lumbar lordosis, limitation of elbow extension, genu varum, and trident hand. (Online Mendelian Inheritance in Man, http://www.ncbi.nlm.nih.gov/Omim, MIM#100800, April 20, 2001)
Achoo syndrome
A disorder characterized by nearly uncontrollable paroxysms of sneezing provoked in a reflex fashion by the sudden exposure of a dark-adapted subject to intensely bright light, usually to brilliant sunlight. The number of successive sneezes is usually 2 or 3, but can be up to about 40. The achoo syndrome is also called the photic sneeze reflex or the helio-ophthalmic outburst syndrome.
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Achilles tendon
A tough sinew that attaches the calf muscle to the back of the heel bone. The Achilles tendon is one of the longest tendons in the body. It is also called the tendo Achilles or the tendo calcaneus, the calcaneus being the heel bone.
Achillobursitis
Pain due to inflammation of the bursa associated with the Achilles tendon. .
Achillodynia
Pain due to inflammation of the Achilles tendon or the bursa associated with it.
Achlorhydria
A lack of hydrochloric acid in the digestive juices in the stomach (in technical terms, so that the pH of the stomach contents fails to fall below 4.0 under maximal stimulation). Hydrochloric acid helps digest food.
Achondrogenesis
A genetic disorder of bonwe resulting in short-limbed dwarfism. There are a number of different types of achondrogenesis. See: Achondrogenesis type II.
Achondrogenesis type II
Achoo syndrome
A disorder characterized by nearly uncontrollable paroxysms of sneezing provoked in a reflex fashion by the sudden exposure of a dark-adapted subject to intensely bright light, usually to brilliant sunlight. The number of successive sneezes is usually 2 or 3, but can be up to about 40. The achoo syndrome is also called the photic sneeze reflex or the helio-ophthalmic outburst syndrome.
Achromycin
See: Tetracycline.
Acid deposition
A complex chemical and atmospheric phenomenon that occurs when emissions of sulfur and nitrogen compounds and other substances are transformed by chemical processes in the atmosphere and then deposited on earth in either wet or dry form. The wet forms, popularly called acid rain, can fall to earth as rain, snow, or fog. The dry forms are acidic gases or particulates.
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