Bullous Urticaria Pigmentosa

Abstract

While macular, maculonodular, and nodular forms of urticaria pigmentosa are well recognized, the occurrence of vesicular and bullous lesions in this disease is regarded as a rarity (Unna, 1896; Pusey, 1907; Stelwagon, 1918; Macleod, 1920; Ormsby and Montgomery, 1948). But it is possible that vesicular and bullous lesions in urticaria pigmentosa may be commoner than has hitherto been supposed, since cases will undoubtedly have been recognized but not reported in the literature and also since purely bullous forms of the disease may well escape recognition when biopsy has not been performed or even perhaps when metachromatic staining methods have been omitted. Little (1905-1906), reviewing the literature since the first description of urticaria pigmentosa by Nettleship (1869), noted four cases in which bullous lesions had been present. Finnerud (1923), discussing cases of urticaria pigmentosa which had been reported since 1906, found eight instances in