The fact that trauma and strain are recognized by most practitioners and no pathologists as etiologic factors in inflammation of the testicle prompted this study. This paper is based on a review of the literature and an analysis of seventy case reports, including twelve from the California Industrial Accident Commission-all that have been passed on by their medical department. In the latter are incorporated opinions from most of the recognized urologists in California and they show a marked lack of uniformity as to the influence of trauma and strain. This is in keeping with the literature, the foreign articles minimizing the possibility of a traumatic orchitis, and the American ignoring or simply didactically accepting it. In our fathers' time many diseases were thought to be due wholly or partially to trauma or miasms, but both terms have been deleted from modern textbooks of medicine and pathology. When the etiologic principles
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