Although the coincidence of pregnancy and maternal malignancy is not rare, only 29 cases of metastases to the products of conception have been previously reported and of these, 14 have been of malignant melanoma. The present case of widespread maternal malignant melanoma metastasizing to the placenta further emphasizes this trend. The mother died of malanomatosis two weeks after induced labour at 36 weeks gestation. The infant, despite widespread placental involvement including apparent foetal vascular invasion, is well and without clinical evidence of disease five months after delivery.