How common is rhabdomyosarcoma of the bladder in infants?

Incidence: Childhood rhabdomyosarcoma "accounts for 3.5% of cancer among children aged 0 to 14 years, 2% of the cases among adolescents and young adults aged 15 to 19 years. The incidence is 4.5 per 1 million children and 50% of cases are seen in the first decade of life.The most common primary sites for rhabdomyosarcoma are the head, the genitourinary tract, and the extremities" cancer.Gov. Best wishes.