Accepted classifications of urticaria pigmentosa do not include a purely papular form. The outstanding monographs on the subject and the standard dermatologic textbooks recognize three distinct clinical types: macular, nodular and maculonodular. In the majority of cases the condition is macular, and the purely nodular type occurs in only a small percentage of the total number. Finnerud,1 in an admirable study of 152 cases of this dermatosis, the most recent and complete summary, reported that in 61.7 per cent of the cases the condition was macular, in 30.5 per cent maculonodular and in 7.8 per cent nodular.
We wish to report the following case of papular urticaria pigmentosa because this form of the dermatosis is extremely rare.
REPORT OF CASE
G. P., a white man aged 32, was admitted to the dermatologic clinic of the New York Hospital on Dec. 28, 1938. He presented an eruption which he had