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- W2130702015 abstract "The patient, a 34-year-old woman, presented with a 4-week history of a painful, unilateral neck mass and torticollis. On examination, she had swelling and tenderness over the right sternocleidomastoid muscle along with restricted neck movement. Her serum creatine kinase level was 186 IU/L (normal 0–165), serum aldolase was 8.9 U/L (normal 1–8), ESR normal. Serology for Trichinella and toxoplasmosis were negative. Biopsy of the sternocleidomastoid muscle demonstrated marked interstitial fibrosis, focal lymphocyte infiltration, no evidence of regeneration, degeneration or vasculitis and a normal amount of glycogen. MRI of the neck revealed significant inflammation in the right sternocleidomastoid muscle (Figs. 1 and 2). She was treated with prednisone and methotrexate for about 10 months with significant improvement of her symptoms. Repeated MRI revealed no enhancement in the right sternocleidomastoid muscle (Fig. 3). She never developed any sign of polymyositis with eighteen months follow-up. Focal myositis is characterized by the selective involvement of a single muscle by the inflammatory process. The diagnosis of focal myositis is determined by biopsy of the muscle. The clinical course is variable, with a high rate of spontaneous regression. However, focal recurrence in other muscles or progression to polymyositis has been reported. Muscle enzymes and erythrocyte sedimentation are usually within the normal range. Heffner and Barron reported 6 patients, each of whom initially had a single, localized, painful mass. They concluded that an essential clue to the diagnosis of polymyositis at the early localized stage is the elevation of ESR and serum creatine kinase that does not occur in focal myositis." @default.
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- W2130702015 date "2007-02-01" @default.
- W2130702015 modified "2023-10-17" @default.
- W2130702015 title "An Unusual Cause of a Neck Mass" @default.
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- W2130702015 doi "https://doi.org/10.1097/01.rhu.0000255771.84106.90" @default.
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