Three pediatric patients with extension of prostatic embryonal rhabdomyosarcoma anterior to the bladder into the space of Retzius

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Abstract
Invasive embryonal rhabdomyosarcoma of the prostate often extends superiorly into the bladder base requiring partial cystectomy as part of excision of the primary tumor. Three patients were studied with ultrasonography CT and MRI and showed the extension of the tumor superiorly and anterior to the bladder in the prevesical space of Retzius. Complete excision with bladder sparing was successful in two of the patients. The imaging of pelvic tumors in children (although well studied with ultrasonography, CT) is helped by MRI in the sagittal plane and/or lateral films of intravenous pyelograms and cystograms to establish the relation of the tumor to the bladder.