title: Diffuse dermographic mastocytosis without visible skin lesions.
abstract: The case is presented of a 3-year-old girl with urticaria and pressure dermographism. The condition began the age of one year. A skin biopsy confirmed the suspected diagnosis of diffuse mastocytosis. The identification of the form of mastocytosis without skin lesions and with dermographism and pressure urticaria as its only signs is important. It should be considered in any chronic urticaria appearing at birth or in an early age which is unresponsive to the usual symptomatic medication.
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D008407:Mast Cells / Q000473:pathology; D011312:Pressure; D012882:Skin Tests; D014582:Urticaria Pigmentosa / Q000175:diagnosis* / Q000473:pathology