Abstract
Some manifestations of urticaria pigmentosa are rarely seen. In his excellent summary of the literature up to and including 1905, E. Graham Little 1 pointed out that only sixteen cases of urticaria pigmentosa had been reported in America out of a total of 154, while the English literature contained sixty-two cases, the German thirty-nine, and the French twenty-four. He showed that of 138 cases in which the sex was recorded, eighty-six, or 61.7 per cent., occurred in males and fifty-two in females, and that of 142 cases in which the age was given, seventy-nine, or 55 per cent., began at or before the sixth month of age and twenty-two, or 14 per cent., began after puberty (13 years). Also, of 123 cases in which the type of lesion was stated, eighty-three were of the macular, twelve of the nodular and twenty-eight of the mixed type. The disorder proved to be
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