Recently, breast and bowel cancers have been tentatively linked to dietary factors. This guide, however, goes far beyond the reasonable conclusions, using a conglomeration of eastern and western medical precepts to make recommendations about cancer types and specific foods--and giving the unfortunate overall impression that traditional medical treatment can be avoided. Kushi, founder of the ""East-West Foundation,"" proposes a macrobiotic diet--50-60 percent whole cereal grains, ""remote evolutionary varieties of plants""--and harmony with the environment as the way to prevent and treat cancer. (""Did I eat today in harmony with my environment?. . . . Did I think of my parents, relatives, and teachers, and elders with love and respect?"") Cancer, he postulates, is a disease of excess; it is also a question of yin and yang (there are both yin and yang cancers). Here, he pinpoints what he feels are the specific causes of leukemias, bone cancers, skin cancers, and all the rest--the remedy is always in mental attitude and a macrobiotic diet. Besides being complicated, this approach is absolutely without foundation in acceptable American medical practice. True, there are strong indications that certain mental attitudes and certain nutritional practices can be a comfort to sufferers, but any suggestion that traditional treatment be abandoned in pursuit of such a questionable alternative is deathly dangerous. See rather Simone, above.