A 79-year-old woman developed ecchymotic lesions of the face, and the
axillary and inguinal areas. No pruritus was experienced and Darier's
sign was negative. However, the patient complained of episodes of flus
hing and diarrhea. Skin biopsy and bone marrow biopsy led to the diagn
osis of systemic mastocytosis. Hemorrhagic manifestations of mastocyto
sis are rather uncommon and their pathogeny is discussed.