CONGENITAL MALIGNANT RHABDOID TUMOR OF THE GUM MARGIN

The case of an infant born with a large polypoid tumour arising from t he mouth is described. The tumour had the histological, immunohistoche mical and ultrastructural phenotype of an extrarenal malignant rhabdoi d tumour and followed an aggressive clinical course. This is one of th e few reported cases of malignant rhabdoid tumour to present at birth. The oral tumour was associated with a mass in the posterior cranial f ossa. This was most likely to be a simultaneous second primary tumour. (C) 1997 Elsevier Science Ltd. All rights reserved.