Sternocleidomastoid tumour in neonate: fibromatosis colli

Description

We report a case of a 4-week-old female neonate who was admitted to the hospital for a anterior right lump of the neck, perceived by his mother the day before. The mother also noticed a preferential tilting of the head towards right. He was an otherwise full-term healthy baby, with a history of instrumented delivery. There was no fever, trauma or respiratory symptoms/signs. Family history was irrelevant. On examination, the neck swelling was a small firm, partially mobile, no warm on touch and apparently painless mass, with approximately 1.5–2 cm soft tissue mass, attached to the right sternocleidomastoid muscle. There was no restriction of neck movements. Ultrasonography (USG) revealed a 13 mm fusiform thickening of the right sternocleidomastoid muscle, with maintained structure of muscle fibres (figures 1 and 2). No cervical lymphadenopathy, signs of infiltration or other anomalies were found (figures 1 and...

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