Single Macule Research Articles

Bullous urticaria pigmentosa: report of an unusual case.

Bullous lesions in association with urticaria pigmentosa have been observed occasionally since recognition of the disease in 1869. Finnerud, 1 in 1923, in a summary of all reported cases of urticaria pigmentosa found that 8 cases out of a total of 308 had vesicles and bullae. Since 1923, a number of references to bullous lesions in urticaria pigmentosa have appeared in various society transactions. The vesicles and bullae were described as being in association with the usual urticaria pigmentosa. In each case reviewed, the classical lesions of urticaria pigmentosa— macules and nodules—were the outstanding feature, although some lesions were bullous. The following case presentation is made because of itsunusual nature. It represents the only reported bullous eruption having the classical histologic picture of urticaria pigmentosa, without a single macule, papule, or other lesion typical of the disease. REPORT OF CASE K. M.—A 6-month-old white girl, was first seen by the