What is the sex predilection for fibromatosis colli?
There is a greater male incidence.
Which side is the most common site of occurrence of fibromatosis colli?
The right sternocleidomastoid muscle is affected in 73% of cases.
What are the possible complications of fibromatosis colli?
Plagiocephaly, facial asymmetry, scoliosis, permanent loss of neck mobility.
Dynamic ultrasound confirmed unilateral, left sternocleidomastoid muscle belly enlargement. There is a fusiform shape, with no discrete mass lesion, increased focal echogenicity corresponding to the enlarged muscle belly, and no calcifications or hematoma present. The contralateral asymptomatic right sternocleidomastoid muscle is normal.
Reactive age-appropriate anterior cervical chain benign lymphadenopathy is also present.