The discussion of some diseases is only occasionally enlivened by the emergence of new worthwhile facts. In the case of others, it would seem that, even if only a few years have passed, each new discussion wears the air of a revolution. Hodgkin's disease, at least from the pathological standpoint, is not so extraordinarily fickle and certainly does not touch either of these two extremes of variability. But it is still a fertile field of study and presents its full share of innovations and practical results. This is perhaps due to the special position it occupies between tumours and...