ONCOLOGY Vol 13 No 7

Drs. Wen and Loeffler present a scholarly review of the management of brain metastases. They correctly note the high frequency of the brain as a site of metastasis and the fact that, overall, there are more metastatic than primary brain tumors.

Dihydropyrimidine dehydrogenase (DPD) is the initial, rate-limiting enzyme in the catabolism of 5-fluorouracil (5-FU). DPD has an important role in regulating the availability of 5-FU for anabolism. It is now clear that DPD also