Bullous pyoderma gangrenosum as a manifestation of leukemia cutis.

The authors present the case of a 67-year-old patient in whom bullous pyoderma gangrenosum was the first symptom of acute myeloid leukemia. Histologically leukemic cells were found in the skin infiltrate, on the basis of which this lesion satisfied the criteria of leukemia cutis. It was underlined that in the background of such atypical bullous cases there are often hemoblastoses or their malignant transformation. Finally the connection between bullous pyoderma gangrenosum and atypical vesiculous Sweet syndrome is discussed.