Rhabdomyoma is a benign tumor of striated muscle origin that is very rare in young children. Review of the world literature revealed 20 cases of extracardiac adult-type rhabdomyoma in the head and neck area. All reported cases have been encapsulated and easily excised.
A 22½-month-old girl with a parapharyngeal rhabdomyoma is unique in that her tumor had atypical histology and lacked a capsule; it could not be "shelled-out."
Shapiro RS, Stool SE, Snow JB, Chamorro H. Parapharyngeal Rhabdomyoma. Arch Otolaryngol. 1975;101(5):323–326. doi:10.1001/archotol.1975.00780340055012
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