Dermatoscopic findings of urticaria pigmentosa
We report a 55 year-old female with asymptomatic brownish macules and papules in the\nneck, inframammary area, lower abdomen and thighs with a positive Darier`s sign since a\nyear ago (). She reported sporadic\nepisodes of epigastric pain, sweating, dizziness, iarrhea and headache. There was no\nhospitalization history for anaphylaxis and drug allergy. Dermoscopy showed a pigment\nnetwork anda light-brownish blot ( and\n). We performed complete blood count,\nhepatogram and kidney function, tryptase and abdominal ultrasonography which were all\nnormal. A biopsy taken from an abdominal lesion showed hyperpigmentation of the basal\nlayer and dermal grouping of lymphocytes and mast cells, identified with the Giemsa\nstaining, around vessels ( and ).