Pyoderma gangrenosum and haematological malignancies

Neutrophilic dermatosis of myeloproliferative disorders. Atypical forms of pyoderma gangrenosum and Sweet's syndrome associated with myeloproliferative disorders

Atypical forms of pyoderma gangrenosum (PG) and Sweet's syndrome (SS) (acute febrile neutrophilic dermatosis) have been separately reported in association with various forms of leukemia over the past decade. A case in which both atypical bullous PG and atypical SS occurred in a patient with myeloid metaplasia is presented, and the literature is reviewed concerning the association of these dermatoses with neoplasias of myeloid origin. The current case and review support the thesis that these dermatoses, when associated with myeloproliferative disorders, represent points on a continuum of noninfectious, nonmetastatic, inflammatory neutrophilic dermatoses that may occur in patients with derangements in myeloid cell proliferation.

Pyoderma gangrenosum

Since its description 50 years ago, pyoderma gangrenosum has continued to capture the attention and imagination of all those who see its dramatic presentation. Clinical observation still provides the only reliable diagnosis. As investigative techniques increase, more and more intriguing immunologic abnormalities associated with this disorder are discovered, but understanding of the pathogenesis remains elusive. It is now recognized as an independent condition as well as a co-condition with many systemic disorders. Many new treatment options are available, allowing much individualization of treatment. For now, pyoderma gangrenosum remains an impressive, relatively easily recognized, but poorly understood disease.