[Diencephalic cachexia (A. Russel's syndrome). Apropos of 3 cases. Importance of transfontanelle ultrasonography].

Three children with diencephalic tumours are described. In these cases, the main clinical features are extreme emaciation and nystagmus. Ultrasonography and computed tomography demonstrated the tumour. In one case, high levels of growth hormone were observed. In the three cases, the tumour was a glioma.