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mucous membrane heal with less apparent cicatrices than those upon the true skin. These cicatrices are so slight that they are only visible on close inspection. No deformity is present, and the non-medical friends may not know of the existence of such lesions. These cicatrices at the commissures of the lips are considered as quite characteristic of inherited syphilis, and I believe correctly, but I am far from saying that similar scars cannot be due to other causes than syphilis. I have seendoi:10.1056/nejm188711241172102 fatcat:n34xfou4zjciphndjqowvxl27a