Focal myositis of the floor of mouth: report of two cases and review of the literature.

[focal myositis]

Focal myositis is an uncommon inflammatory myopathy of unknown cause affecting skeletal muscle . It may be mistaken on clinical evaluation for a malignant neoplasm . We describe two cases , both involving the mylohyoid muscle of the floor of the mouth . In each case excisional biopsy of a firm indurated mass revealed a focal lymphocytic and histiocytic infiltrate associated with degenerating and regenerating skeletal muscle fibers . No clinical or biochemical evidence of generalized muscle disease was seen at presentation or at 1 -year and 7 -year follow-up examination . The literature on focal myositis involving the head and neck region is reviewed .

Diseases
Validation

Diseases presenting "skeletal muscle" symptom

cadasil

epidermolysis bullosa simplex

esophageal adenocarcinoma

focal myositis

hereditary cerebral hemorrhage with amyloidosis

inclusion body myositis

lamellar ichthyosis

neuralgic amyotrophy

pleomorphic liposarcoma

pyomyositis

pyruvate dehydrogenase deficiency

systemic capillary leak syndrome

well-differentiated liposarcoma

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