Presentation
Lump on the thumb. Slowly increasing in size over the last month. Abnormal ultrasound scan (not available).
Patient Data
Age: 6 years
Gender: Male
From the case:
Rhabdomyosarcoma (thumb)
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T1

Abnormal belly of opponens pollicis with T2 hyperintensity and abnormal enhancement.
Case Discussion
A muscle biopsy confirmed rhabdomyosarcoma.