tumours of the adrenal medulla and of the sympathetic nervous system as argentaffin tumours. True adeno-carcinoma is less common. It is usually near the proximal end of the appendix, and runs a course similar to that of a carcinoma of the caecum. INTRACRANIAL involvement in Hodgkin's disease has been described on numerous occasions. Spinal involvement is somewhat rarer, although one authority s...