Pyoderma gangrenosum associated with limited cutaneous systemic sclerosis: a rare case with literature review.

Pyoderma gangrenosum (PG) is a skin disease characterized by painful ulcers that, when not appropriately treated, can lead to permanent disfigurement. Pyoderma gangrenosum has been observed in a multitude of autoimmune disorders such as rheumatoid arthritis, inflammatory bowel disease (IBD), and sarcoidosis (Feld et al. J Rheumatol.