Bio-Dynamo-Chromatic (B-D-C) Diagnosis
Bio-Dynamo-Chromatic (B-D-C) Diagnosis is a method that was developed by George Starr White to diagnose illness in a patient through percussion of the abdomen in conjunction with directional positioning in space and the use of coloured light rays. Among other claims, White held that the B-D-C diagnosis would uncover cancers "before any known method" and positively detected a variety of ailments, including gonorrhea and syphilis.
- "George Starr White — Quack", Jour. A.M.A. 92 (15): 1293, 1929-04-13, "The difference between Abrams' diagnostic methods and White's was not great. White's method seems to have been to have the patient face east or west and have his bare abdomen percussed until a dull area was located. The patient was then faced north or south and again percussed. Then different colored lights were thrown on the patient, the location of the areas of dullness being determined meanwhile. It was claimed that a combination of ruby and blue lights will "cause a reflex in cases of gonorrhea," a "green light will cause a reflex in cases of liver or gallbladder trouble," while the color for carcinoma was orange-red. White claimed at the time that his B-D-C would "diagnose cancer before any known method" and that many cases that had been diagnosed as nonsyphilitic, he "diagnoses by this method as being syphilitic, and time has proved they were.""