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Although the literature is filled with numerous reports on the various observed forms in which psoriasis manifests itself, a repeated and careful perusal of the recorded cases has failed to bring to light anything similar to the one here reported, and I am therefore convinced that it is a hitherto undescribed form of the disease; namely, an atypical case of chronic psoriasis associated with tumor-like growths.
This type of psoriasis presents a remarkable resemblance in clinical appearance to other dermatoses as well as other forms of psoriasis. For example, it simulates in appearance a case of parakeratosis ostracea (scutularis) described by Unna in 1890 in the International Atlas; and, another by Ludwig Weiss in 1912 in The Journal of the American Medical Association. It also bears a strong resemblance to mycosis fungoides, psoriasis rupioides, psoriasis verrucosa, dermatitis caused by arsenic, and in many ways suggests sarcoma, especially Kaposi's sarcoma. However,