proliferative myositis


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pro·lif·er·a·tive my·o·si·tis

a rapidly growing benign infiltrating fibrous nodule in skeletal muscle, containing characteristic giant cells resembling ganglion cells.

proliferative myositis

A rare intramuscular inflammatory condition with a pseudosarconomatous appearance, which is characterised by rapid growth and diffuse infiltration of the muscle of the upper extremities and trunk, often in a background of trauma. Proliferative myositis has a characteristic “checkerboard” pattern of distribution in the muscle fibres and surrounding connective tissue, which can be identified by ultrasonography and computed tomography and is confirmed on the pathology specimen.
References in periodicals archive ?
6) Hasan et al, however, described a case of proliferative myositis that displayed linear reticulated hypodensities on CT characteristic of the "checkerboard-like" pattern.
The key in diagnosing proliferative myositis lies in identifying the preserved continuous muscle bundles, which are a specific finding not described in other similar diagnoses or in soft tissue malignancies.
Proliferative myositis, while rare, is an important consideration in the differential diagnosis of a rapidly enlarging soft tissue (in particular intramuscular) mass.

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