Cutaneous polyarteritis nodosa presenting as a paraneoplastic phenomenon in chronic myelogenous leukemia.

There is a well-established relationship between vasculitides and malignancy. The most common type of cutaneous vasculitis associated with both hematologic and solid organ malignancy is leukocytoclastic vasculitis, a small-vessel vasculitis.1-4 Other systemic vasculitides with cutaneous manifestations seen in association with malignancy include systemic polyarteritis nodosa (PAN) and the antineutrophil cytoplasmic antibody-associated vasculitides, including microscopic polyangiitis, granulomatosis with polyangiitis, and eosinophilic granulomatosis with polyangiitis.