Differential Diagnosis of Pyoderma Gangrenosum

Pyoderma Gangrenosum 

Differential diagnosis of pyoderma gangrenosum / causes of pyoderma gangrenosum are :

-idiopathic
-inflammatory bowel disease
-leukemia
-polycythemia rubra vera
-myeloma
-seronegative arthritides
-rheumatoid arthritis 
-autoimmune hepatitis