RESUMO
This is a report of two cases of giant sacrococcygeal teratoma [SCT] with completely different clinical appearance, histological pattern, and hematological findings. In the first case, the malignant nature of the tumor was apparent at birth, whereas the second patient had mature, non-malignant tumor and presented after eight months of birth. In the first case early and complete excision cured him completely of his tumor as was evident in his three years follow up with normal alpha-fetoprotein levels. Whereas in the second patient, the benign and mature nature of the tumor prevented malignant change although patient presented late. In both patients reconstruction of anatomical structures was performed. Early and late postoperative appearance was comparable to normal