A neonate with sternocleidomastoid tumor of infancy
A previously healthy 3-week-old child presented to the emergency room for evaluation of acute-onset left-sided neck swelling. The parents initially noticed it during the previous week and had brought him to the pediatrician, who felt it was a reactive lymph node.

However, owing to a concern about the increasing size, they brought him in for reevaluation. Examination revealed a 2 × 2 cm, firm, nontender mass in the lower left neck with no overlying skin changes. There was no obvious limitation in range of motion. According to the parents, the child had no recent fever, changes in feeding habits, or number of wet diapers. The child’s prenatal, birth, and postpartum history were otherwise insignificant.

Ultrasound revealed a 1.6 × 2.1 × 1.4 cm region of heterogenous echogenicity and fusiform thickening within the left sternocleidomastoid muscle, with ill-defined borders and mild vascularity on Doppler.

The child was diagnosed with fibromatosis colli. Also known as sternocleidomastoid tumor of infancy, this benign neck mass is due to fibroblastic hyperplasia that usually infiltrates the lower third of the sternocleidomastoid.

The tumor is self-limiting and usually resolves within 4-8 months of onset. As in this child, most cases resolve with conservative management with physical therapy and massage. Surgery is rarely required for persistent tumors recalcitrant to conservative measures.

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Dr. M●●d I●●●●d
Dr. M●●d I●●●●d Paediatrics
SCM tumor
Oct 23, 2018Like
Dr. M●●●●●●d S●●●●●r
Dr. M●●●●●●d S●●●●●r Paediatrics
Was the child having any torticollis?
Oct 31, 2018Like