perineal alveolar rhabdomyosarcoma
References
McCarty ML, Wilson MW, Ibrahim F, Fuller CE, Kun LE, Haik BG. Primary perineal alveolar rhabdomyosarcoma metastatic to an extraocular muscle. Ophthal Plast Reconstr Surg. 2003 Jul;19(4):333-5. PMID: 12878888