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 "neoplasm" symptom

adrenal incidentaloma

alexander disease

aromatase deficiency

carcinoma of the gallbladder

cholangiocarcinoma

cowden syndrome

cushing syndrome

cutaneous mastocytosis

dedifferentiated liposarcoma

dentin dysplasia

erdheim-chester disease

esophageal adenocarcinoma

esophageal carcinoma

familial hypocalciuric hypercalcemia

focal myositis

hodgkin lymphoma, classical

hydrocephalus with stenosis of the aqueduct of sylvius

junctional epidermolysis bullosa

kabuki syndrome

liposarcoma

lymphangioleiomyomatosis

pleomorphic liposarcoma

primary effusion lymphoma

proteus syndrome

pyomyositis

von hippel-lindau disease

waldenström macroglobulinemia

well-differentiated liposarcoma

werner syndrome

wolf-hirschhorn syndrome

This symptom has already been validated