턱끝근에서 이형성 석회화로 개시된 외상성 골화성 근육염
Myositis Ossificans Traumatica Initiated by Dystrophic Calcification in Mentalis Muscle
김연숙, 박종철, 이석근,
소속 상세정보
김연숙 ( Kim Yeon-Sook ) - 청주대학교 치위생학과
박종철 ( Park Jong-Cheol ) - 강릉원주대학교 치과대학 구강병리학교실
이석근 ( Lee Suk-Keun ) - 강릉원주대학교 치과대학 구강병리학교실
KMID : 0829220110350060363
Abstract
Myositis ossificans traumatica(MOT) in head and neck area is a rare non-neoplastic, heterotopic bone formation within a muscle, arising after trauma or surgery. Although the several case reports have described the occurrence of MOT in other muscles of oro-facial musculature, MOT has never been reported in mentalis muscle. We demonstrate a case of MOT occurred in mentalis muscle of a 64 years old male. He recently complained of a movable mass with no pain. He had experienced a hitting trauma on his right anterior mandible about 25 years ago. Since then, the trauma area has been asymptomatic. The lesion showed severe muscular degeneration, resulted in a pseudocystic change without epithelial lining. The ectopic ossification was closely associated with the fibrous fascia of adjacent muscles. The lesion contained a lot of basophilic materials admixed with atrophying cells, which were supposed to be derived from muscle parenchyma injured previously. It was presumed that the basophilic materials induced callus-like ossification in the fibro-muscular lesion, also recruited macrophages and fibroblasts. However, the ossification processes in MOT were predominantly characterized by dystrophic calcification without osteoblastic differentiation of mesenchymal cells. Even more, there appeared some skeletal muscle bundles which were calcified dystrophically. Therefore, we suggest the present case of MOT might be initiated by dystrophic calcification in the degenerating muscle tissue.
키워드
Callus-like materials; Dystrophic calcification; Mentalis muscle
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