There are no clinical reports on the presence of oral lesions in patients with pityriasis rosea. However, such lesions have been observed and reported at meetings of some American dermatologic societies.
Both Wile1 and Hazen2 have described oral involvement in pityriasis rosea. However, Guequierre3 appears to have been the first to present before a dermatologic society patients showing concomitant oral lesions. Rosen4 has observed lesions on the tongue.
It is not generally known that the cutaneous lesions of pityriasis rosea may be accompanied by oral lesions. Such lesions are symptomless and usually insignificant but apparently may occasionally, as in the present instance, be extensive. The oral lesions of pityriasis rosea are not present during the entire course of the disease, but it appears that they are more apt to be seen during the height of the disease. As a rule only solitary lesions are observed, and
GREENBAUM SS. ORAL LESIONS IN PITYRIASIS ROSEA. Arch Derm Syphilol. 1941;44(1):55–57. doi:10.1001/archderm.1941.01500010058010
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