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JAMA. 1917;LXIX(15):1217-1220. doi:10.1001/jama.1917.02590420009003.
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We recognize four clinical varieties of chancroid:

  1. Ulcus molle, the ordinary variety of ulcer, has the characteristic punched-out appearance, with edges cleancut and often undermined.

  2. Ulcus molle miliare begins as a small papule, which rapidly becomes a pustule, the center of which is a deep craterlike ulcer. It occurs most frequently on exposed surfaces in the loose skin, just posterior to the mucocutaneous junction of the prepuce in man and about the labia majora and the perineum in woman.

  3. Ulcus molle elevatum is the sore most frequently confused with indurated chancre. Its incubation period is from nine to twenty-one days. The sore is slightly raised above a mildly infiltrated base. The edges are not undermined, and it has little tendency to spread. This form is resistant to ordinary treatment and is prone to persist for from four to eight weeks.

  4. Ulcus molle phagedenicum is the most severe and the most


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