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Arch Dermatol. 2005;141:12.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

THE JOURNAL OF CUTANEOUS DISEASES INCLUDING SYPHILIS
VOL. XXIII.
JANUARY, 1905.
NO. 1.

By JAMES C. JOHNSTON, A.B., M.D.

Unna’s Theory of Origin: Briefly his contention is as follows: Studying the nævi of infants and children—i.e., in an early stage—he describes a process of downgrowth and snaring off by connective tissue of the epithelium.

Ribbert’s Theory: Ribbert occupies a unique position which is capable of perfect defense, since it cannot be assailed. He holds that one cell only can, a priori, give rise to melanosarcoma, the chromatophore. "Since the pigment cells of the choroid are characteristic in shape and in the production of pigment and cannot be identified with any other connective tissue element, it is certain that tumor cells originating from them must represent special cells that cannot be mistaken for the elements of any other sarcoma even if . . . [Full Text of this Article]

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