Mycosis Fungoides Following Psoriasis

There are few diseases primarily affecting the skin which can appear in so many different forms as mycosis fungoides, and which, in the early stages may prove so difficult to recognize. It is also true that there are few diseases of the skin which have been studied so thoroughly from a clinical and pathologic standpoint. In spite of this we are still ignorant as to the cause and real nature of this affection. On account of some interesting features the following case seems worthy of being placed on record. History.— September 1912: The patient, G. L. S., was a man aged 47, born in the United States, an insurance agent. He was married and was the father of two apparently healthy children. An aunt was said to have suffered from psoriasis during her entire life. The patient had suffered from the usual diseases of childhood. At the age of 20,