Sacrococcygeal chordomas apparently are rare tumors, especially in children, for only one such case could be found on record in the literature. However, as we have observed three young children with this tumor in the past eighteen months, it has seemed worth while to report the cases and to call attention to these neoplasms, which are perhaps being overlooked.
The term chordoma, first used by Ribbert1 (1894) to designate a group of tumors occurring in the spheno-occipital region of the skull, is at present applied to malignant tumors that are composed of cells having the characteristic appearance of the cells of the notochord. Chordomas are being recognized more frequently since Stewart,2 in 1922, collected twenty-six cases from the literature and published the first clinical review of this subject. While in a few instances the tumors have been situated at various levels along the spine, the majority have occurred