Abstract
Objective To investigate the relationship between the bloodsupply of sternocleidomastoid muscle (SCM) and the formation of sternocleidomastoid psuedotumor in infancy(SCMPOI). Methods The blood supply of 6 specimens of SCM from infant cadavers was studied with macro-micro-examination. Twenty-five specimens of SCMPOI were studied by light microscopy. Results There were at least four muscular arterial branches originated from different situs and directions. The specimens from SCMPOI are much like fibrous tumor with some mixed up muscles. Under light microscopy , the tumors showed intersitial proliferation but without calcification, bleeding or inflammatory reaction.Conclusion Bases on the pathology characteristic of SCMPOI, the authors suggest that the developmental disturbance of SCM may lead to the formation of congenital muscular torticollis.
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