Diffuse cutaneous mastocytosis is very rare variety mast-cell disorder
   which is called peseudoxanthomatous mastocytosis. Our case was a man
   who was eighteen years old. He suffered from yellow papules on the neck,
   extremities , axillary and groins. The appearance of large blisters following
   mild trauma or occuring spontaneously. Our patients Pruritus was not very
   server.

         The examination of his skin revealed yellow boggy and thickened skin
   with a doughy consistency without systemic involvement. Considering
   the clinical signs and using the skin biopsy reports of the patient, the
   illness was diagnosed as peseudoxanthomatous mastocytosis.