myositis ossificans

(redirected from Myositis ossificans traumatica)
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myositis

 [mi″o-si´tis]
inflammation of a voluntary muscle; called also initis.
myositis fibro´sa a type in which there is a formation of connective tissue in the muscle.
multiple myositis polymyositis.
myositis ossi´ficans myositis marked by bony deposits in muscle.
trichinous myositis that which is caused by the presence of Trichinella spiralis.

my·o·si·tis os·sif·'i·cans

ossification or deposit of bone in muscle with fibrosis, causing pain and swelling in muscles.

myositis ossificans

[əsif′əkanz]
a rare inherited disease in which muscle tissue is replaced by bone. It begins in childhood, with stiffness in the neck and back, and progresses to rigidity of the spine, trunk, and limbs. The administration of diphosphonates may prevent the abnormal deposition of bone, but there is no cure after it has occurred. Metabolism of calcium and phosphate remains normal throughout the course of the disease. Compare myositis.

myositis ossificans

A term that is slowly being retired from the medical literature, largely in favour of heterotopic ossification, given that
(1) inflammation is not a necessary precursor for heterotopic ossification; and
(2) the ossification doesn’t always occur in muscle, but may occur in fascia, tendons, and other mesenchymal soft tissues.

Clinical forms, myositis ossificans
• Localised: linked to trauma.
• Generalised: now known as fibrodysplasia ossificans progressiva, which is often due to spontaneous mutation, resulting in autosomal dominant pattern of inheritance in the proband’s progeny.

myositis ossificans

Bone formed within muscle; localized MO is 2º to trauma resulting from a blow or muscle tearing; generalized MO is AD, often accompanied by aplasia of the thumb, great toe, or rarely other digits, in which the first 'tumor' occurs in the paravertebral or cervical region, followed by multiple ossifying tumors, forming calcifying bridges across muscles and joints resulting in massive rigidity and the Pt is turned into 'stone'. See Zoning phenomenon.

het·er·o·top·ic os·si·fi·ca·tion

(het'ĕr-ō-top'ik os'i-fi-kā'shŭn)
Growth of calcium deposits within soft tissue, usually at the site of a hematoma due to blunt trauma or in tissue atrophied due to central nervous system injury.
Synonym(s): myositis ossificans.

myositis ossificans

A rare, usually familial, inflammatory disease of muscle in which CALCIFICATION occurs followed by the formation of bony tissue within the affected muscles.

myositis ossificans

ossification (bone deposition) and fibrosis of muscle tissue; may be induced by traumatic muscle injury; characterized by local pain, swelling and dysfunction, and later atrophy, contracture and calcification

myositis

inflammation of a voluntary muscle. Causes heat, swelling, pain and lameness if a limb is affected. Trauma is the common cause, especially in racing and work horses. Blackleg is a specific myositis. See also polymyositis.

atrophic myositis
a form of masticatory myositis in dogs. There is a chronic, progressive atrophy and fibrosis of the masticatory muscles of dogs which finally makes it impossible for the mouth to be opened wider than a few inches.
eosinophilic myositis
1. a form of masticatory myositis seen in German shepherd dogs. It is acute, often recurrent, and there is painful, bilaterally symmetrical swelling of the masticatory muscles, mainly temporals and masseters. Often there is an eosinophilia found in the hemogram. Occasionally other muscles are also involved. There is a progressive atrophy and fibrosis of the muscles, frequently resulting in an inability to open the mouth. In the latter it may be confused clinically with atrophic myositis (above).
2. a lesion found at meat inspection. It reduces the value of the carcass. The cause is unknown.
familial myositis
see canine familial dermatomyositis.
myositis fibrosa
a type in which there is formation of connective tissue in the muscle.
masticatory myositis
see atrophic myositis and eosinophilic myositis (above).
maxillary myositis
a slowly developing myogenic degeneration of the muscles of the jaw in horses.
multiple myositis
polymyositis.
myositis ossificans
a generalized myositis with dystrophic ossification in muscle. It occurs in pigs, in which it may be familial, and rarely in dogs and cats.
trichinous myositis
caused by the presence of Trichinella spiralis.
References in periodicals archive ?
1) Such ectopic bone formation occurring following injury has been known by various names such as heterotopic ossification, (2) hyperostosis, (3) para-articular ossification, (4) and myositis ossificans traumatica.