The relation of lupus erythematosus to tuberculosis has long been the subject of a discussion, the final settlement of which we can hardly look for at the present state of our knowledge.
Until more is known of the eruptions which are in some way allied to tuberculosis and which, provisionally, are said to be due to tubercular toxins, and until we obtain more accurate knowledge regarding the cause of lupus erythematosus, our discussions must be of a purely clinical character.
Clinical discussion, although not conclusive, is nevertheless of value, as it eliminates from the controversy many mooted questions, and it renders clinical observation more keen and accurate.
OPINIONS OF VARIOUS WRITERS.
Those who believe that lupus erythematosus is a manifestation of tuberculosis are mostly members of the French school of dermatology. They state that a careful analysis of the family history and a thorough examination of patients