Thickening of the sternocleidomastoid muscleTags: Musculoskeletal sonography, Soft tissues sonography, Images, Video, Clinical report, Esaote MyLab 70, Pediatric Posts 21:10 29-12-2015 Thickening of the sternocleidomastoid muscle#1 A child 17 days-old with complaints of neck asymmetry, suspected torticollis, lesion in the submandibular region - at US thickening (hypertrophy?) of the sternocleidomastoid muscle (dif.diag.: torticollis/fibromatosis colli, tear, etc.). external link :: attachments(2) :::: file 1 :::: file 2 :: HTML5 video plugin not supported!