- Merkel cell carcinoma
- Epidermoid cyst
This boy has a rhabdomyosarcoma (RMS), a malignant mesenchymal tumor of skeletal muscle derivation. Though rare in adults, it is the most common soft tissue carcinoma in children and adolescents.
- Primary cutaneous RMS most often occurs due to invasion from deeper structure or a frank metastatic event; secondary cutaneous RMS represents advanced disease with a poor prognosis
- RMS can occur anywhere in the body, but is more likely to originate in the head and neck; the urinary system (including the bladder); the reproductive system; or the arms and legs
- Genetic syndromes and maternal factors associated with childhood RMS include parental cocaine and marijuana use, Li-Fraumeni syndrome, neurofibromatosis type 1, Beckwith-Wiedemann syndrome, and Costello syndrome
Pearls for Urgent Care Management and Considerations for Transfer
- Emergent transfer is not necessary, but immediate referral to the child’s pediatrician is advisable. Ultimately, the child should be seen by a pediatric oncologist as soon as possible
Acknowledgment: Image courtesy of VisualDx.