Malignant triton tumor of the pelvis in a 2-year-old boy.

We report a 2-year-old boy who had a family history of neurofibromatosis, multiple cafe-au-lait spots on the trunk, tibial pseudarthrosis, and was diagnosed with a malignant triton tumor of the pelvis. To our knowledge our case is one of the youngest patients reported with a malignant triton tumor and the second pediatric case with a pelvic malignant triton tumor.