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A term newborn presented with a red-violaceous mass on the left hand encompassing the thenar eminence (figure 1). Ultrasonography showed a solid, slightly vascularised lesion involving the first metacarpal. MRI showed a solid, hypovascular mass with an area of necrosis infiltrating and involving the first metacarpal (figure 2A). A biopsy of the lesion was performed, which confirmed that it was a benign mesenchymal tumour compatible with myofibroma. A watchful waiting attitude with annual MRI controls …
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Provenance and peer review Not commissioned; internally peer reviewed.
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