[Rapid progressive focal myositis of the head and neck region: a case report].

[focal myositis]

A 46 -year -old woman noticed a painful lump in the neck following fluctuating multiple arthralgia in the previous 3 months . The neck nodule grew rapidly , and was associated with an elevation of the serum creatine kinase activity . Under a diagnosis of focal myositis , corticosteroids were introduced , soon resulting in an amelioration of the symptoms . A biopsy from the neck nodule revealed a muscle tissue with scattered foci of densely packed inflammatory cells . Some of the cells had features similar to the granuloma , which were compact collection of cells and partial tendency of the cell fusion . These findings suggest a close relation between some cases focal myositis and granulomatous myopathy .