“…More and more pharm aceutical products and treatm ents are tried w ithout any considerable success. In the last decade keen interest was shown in substances inhibiting mitosis and especially in nitrogen m ustard (nm) [1,6,8,12,23,34]. On the basis of the investigations of about 20 years it has been definitely stated th a t the general progress of the disease can not be checked by these substances, only the symptoms of the disease may be tem porarily regressed [10,21,33], the recurrence, however, may appear at any time.…”