“…PLATES XLVI-XLVIII PIGMENTED tumours of the nervous system are not common. In the central nervous system they can be classified into three main types, (1)primarymalignant melanoma of the meninges (Russell and Rubinstein, 1971), (2) metastatic malignant melanoma and (3) melanotic variants of certain types of tumour including meningioma (Keegan and Mullan, 1962;Turnbull and Tom, 1963 ;Abbott, Killefer and Crandall, 1968 ;Scott, Ferrara and Peale, 1971), medulloblastoma (Fowler and Simpson, 1962) and medulloepithelioma (Treip, 1957). Melanin has also been identified in peripheral nerve sheath tumours (Mandybur, 1974), variously reported as melanotic schwannonia (Hodson, 1961 ;Shillitoe, 1965;Dastur, Sinh and Pandya, 1967;Theodossiou and Segditsas, 1971) and pigmented neurofibroma (Bird and Willis, 1969;Harkin and Reed, 1969).…”