[Primary embryonic rhabdomyosarcoma of the prostate. An unusual location].

We report on an 18-year-old patient with embryonal rhabdomyosarcoma of the prostate who presented with urinary retention. An ultrasound-guided percutaneous punction corroborated the presumptive diagnosis. The patient was submitted to the appropriate combined treatment modality of chemotherapy, radiotherapy and surgery; however, the virulence of tumor spread led to a fatal outcome less than one year following treatment.