Vol. 17 FXG. 4. A, A buttock mass in this 7-year-old girl proved to be embryonal rhabdomyosarcoma. B, The operative specimen from the local resection.FIGS. 12 and 11. In Fig. 12 is an area unusually rich in bright acidophilic strap cells lacking in cross striations that are clearly shown (arrow) in Fig. 13.