Etymologically the term "sarcoid" would seem to convey the conception of a tumor formation resembling sarcoma. It was first employed by Kaposi to comprise a number of cutaneous disorders, including mycosis fungoides, lymphodermia and even true sarcoma. Its more general and exact use dates from Boeck's publication in 1899. He there described as multiple benign sarcoid and later, in 1905, as benign miliary lupoid, cases presenting numerous deep-seated cutaneous nodules or tumor-like formations of varying size, situated on the face and other parts of the body, presenting a characteristic histologic picture and thought to be due to a modified effect of the tubercle bacillus.
Far from strengthening or clarifying this new clinical and pathologic entity, further observations have rather complicated the situation, not only in morphologic respect, but also in regard to the histology and etiology. Thus we find Darier in 1910 giving us four types of sarcoid, based on
ZEISLER J. AN UNCOMMON CASE OF MULTIPLE BENIGN SARCOID OF THE SKIN. JAMA. 1915;LXV(9):764–767. doi:10.1001/jama.1915.02580090012004
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