Our interest in lesions on mucous membranes in patients with pityriasis rosea began the first time we saw a patient with such a lesion, on Jan. 21, 1938. The patient we saw at that time and several others were subsequently presented before the Philadelphia Dermatological Society.1
During the discussion of the first patient the diagnosis was disputed, but no other tenable diagnosis was offered. No one remembered at this time that Butterworth2 had previously cited Hazen and Wile as having noted involvement of mucous membranes in pityriasis rosea. Pick3 also cited Hazen, and Andrews4 cited Hazen and Wile.
In a personal communication from Dr. Wile in 1938 he stated that he had seen occasional lesions of pityriasis rosea in the mouth. In one of his patients on whose body vesicular lesions were present, the same kind of lesions were present in the mouth and in the
GUEQUIERRE JP, WRIGHT CS. PITYRIASIS ROSEA WITH LESIONS ON MUCOUS MEMBRANES. Arch Derm Syphilol. 1941;43(6):1000–1003. doi:10.1001/archderm.1941.01490240080011
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