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JAMA. 1907;XLVIII(7):559-562. doi:10.1001/jama.1907.25220330001001.
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In his work on "Differentialdiagnose von Dermatosen und Lues bei den Schleimhauterkrankungen der Mundhoehle, etc.," Trautmann gives a carefully prepared review of the 72 cases of lichen planus of the mucous membranes published up to 1903. There are other cases mentioned in literature, but very briefly. Considering the comparatively frequent occurrence of lichen planus of the skin, the localization of the process on the mucous membranes is rather rare, and it is interesting to note that this subject is rarely and only recently touched on in American literature. Among the cases cited by Trautmann none is from an American author. The importance of this affection is evidenced by the fact that it may easily be confounded with syphilis. There are cases of lichen planus which have a distribution limited to the palms of the hands or to the soles of the feet, or to the penis or to the scrotum,


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