What is the theme in The Medical Detectives by Berton Roueche?

Medical investigation is the main theme of the book. Readers of this compilation of medical stories will be struck by an overriding concept. When medical "mysteries" arise, methods of investigation clearly mirror those of criminal investigations. The first step is a thorough study of the symptoms and the environment in which these symptoms have arisen, much like the study conducted of a crime scene. Data is collected and is often scientifically studied and tested, in order to glean as much information as possible.