Surveillance after initial surgery for Stage I pediatric and adolescent boys with malignant testicular germ cell tumors: Report from the Children's Oncology Group.

Purpose: The purpose of this study was to determine prognostic factors correlating with outcome in boys with Stage I malignant testicular germ cell tumors (MTGCT) initially managed with surveillance after surgical resection.

Methods: Between November 2003 and July 2011, 80 boys 0-15 years with Stage I MTGCT were enrolled in Children's Oncology Group Study AGCT0132. Those with residual or recurrent disease were treated with chemotherapy.