We report four cases of focal myositis. The patients, three men and one woman, had painful muscle hypertrophy, affecting four different sites. MRI confirmed the muscle enlargement and oedema. Electromyography revealed evidence of acute and chronic denervation in all four cases. Muscle biopsy was available in three and confirmed features suggestive of focal myositis. Based on our patient material, we suggest that chronic nerve irritation, such as compression, can lead to muscle hypertrophy which, when prolonged, provokes fibre necrosis and secondary inflammation. Our finding in four patients having hypertrophy involving four different sites, leads us further to suggest that this may be the common mechanism behind focal myositis. (C) 2011 Elsevier B.V. All rights reserved.
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Hop St Marguerite, Serv Radiol, Marseille, FranceHop St Marguerite, Serv Radiol, Marseille, France
Laurent, Pierre-Eloi
Larribe, Maud
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Hop St Marguerite, Serv Radiol, Marseille, FranceHop St Marguerite, Serv Radiol, Marseille, France
Larribe, Maud
Guenoun, Daphne
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Hop St Marguerite, Serv Radiol, Marseille, France
Fac Med Marseille, Anat Lab, F-13385 Marseille, FranceHop St Marguerite, Serv Radiol, Marseille, France
Guenoun, Daphne
Champsaur, Pierre
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Hop St Marguerite, Serv Radiol, Marseille, France
Fac Med Marseille, Anat Lab, F-13385 Marseille, FranceHop St Marguerite, Serv Radiol, Marseille, France
Champsaur, Pierre
Le Corroller, Thomas
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Hop St Marguerite, Serv Radiol, Marseille, France
Fac Med Marseille, Anat Lab, F-13385 Marseille, FranceHop St Marguerite, Serv Radiol, Marseille, France
机构:
Michigan State Univ, Ascens Providence Hosp, Internal Med, Southfield, MI USAMichigan State Univ, Ascens Providence Hosp, Internal Med, Southfield, MI USA
Aouthmany, Ayman
Makadsi, Sarah
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Michigan State Univ, Ascens Providence Hosp, Internal Med, Southfield, MI USAMichigan State Univ, Ascens Providence Hosp, Internal Med, Southfield, MI USA
Makadsi, Sarah
Iskenderian, Ziyad
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Michigan State Univ, Ascens Providence Hosp, Internal Med, Southfield, MI USAMichigan State Univ, Ascens Providence Hosp, Internal Med, Southfield, MI USA