Even though Cayce didn't have a formal education much beyond grammar school, he was a voracious reader, worked in bookstores, and was especially fond of occult and osteopathic literature. (Osteopathy, in his day, was primitive and akin to naturopathy and folk medicine.) He was in contact with and assisted by people with various medical backgrounds. Even so, many of his readings would probably only make sense to an osteopath of his day. Martin Gardner cites Cayce's reading of Cayce's own wife as an example. The woman was suffering from tuberculosis:
.... from the head, pains along through the body from the second, fifth and sixth dorsals, and from the first and second lumbar...tie-ups here, floating lesions, or lateral lesions, in the muscular and nerve fibers which supply the lower end of the lung and the diaphragm...in conjunction with the sympathetic nerve of the solar plexus, coming in conjunction with the solar plexus at the end of the stomach.... (Gardner 1957: 217)
The fact that Cayce mentions the lung is taken by his followers as evidence of a correct diagnosis; it counts as a psychic "hit." But what about the incorrect diagnoses: dorsals, lumbar, floating lesions, solar plexus and stomach? Why aren't those counted as diagnostic misses? And why did Cayce recommend osteopathic treatment for people with tuberculosis, epilepsy, and cancer?
In addition to osteopathy, Cayce was knowledgeable of homeopathy and naturopathy. According to Dale Beyerstein, Cayce was one of the first to recommend laetrile as a cancer cure.* (Laetrile is chemically related to amygdalin, a substance found naturally in the pits of apricots and various other fruits, and is known to be ineffective for cancer.) Beyerstein writes:
Stearn (1967) summarizes Cayce's pronouncements on cancer. He reports that Cayce prescribed a serum made from the blood of rabbits for patients with "glandular," breast, and thyroid cancers, and in 1926, prescribed for a New York patient the raw side of a freshly skinned rabbit, still warm with blood, fur side out, placed on the breast for cancer of that area. "Animated ash," produced by taking bamboo fibers and passing an electrical charge through them, thereby producing the right vibrations for "life flowing effects," was another of his favorite cures.
Cayce also recommended "oil of smoke" (creosote made from pine tar*) for a leg sore; "peach-tree poultice" for convulsions; "bedbug juice" for dropsy; "fumes of apple brandy from a charred keg" for tuberculosis; and peanut oil rub to prevent arthritis (Gardner 1957). Gardner notes that Cayce recommended almonds to prevent cancer, but he makes no mention of laetrile either as a preventive or a cure of anything.