Congenital sacral mesenchymal chondrosarcoma in a neonate: a case report and review of literature.

Mesenchymal chondrosarcomas are rare malignant tumours in children, especially, in neonates. The authors present a case of congenital mesenchymal chondrosarcoma in a 1-day neonate located in sacrum. According to the authors' literature searches, this case is the first congenital sacral mesenchymal chondrosarcoma. We also reviewed the papers published in English literatures.