Pyoderma gangrenosum: uncommon presentations

Area of Science:

• Dermatology
• Internal Medicine
• Pathology

Background:

• Pyoderma gangrenosum (PG) is a rare, noninfective, inflammatory skin disorder.
• It is frequently associated with systemic diseases like inflammatory bowel disease, rheumatoid arthritis, paraproteinaemia, or hematologic malignancy, found in up to 50% of patients.
• First described by Brunsting et al. in 1930, PG was initially thought to be linked to bacterial infection and bowel disease.

Purpose of the Study:

• To clarify the nature of Pyoderma gangrenosum.
• To expand the understanding of its association with systemic diseases beyond inflammatory bowel disease.
• To differentiate PG from infectious causes and broaden its clinical concept.

Main Methods:

• Review of historical descriptions and clinical observations of Pyoderma gangrenosum.
• Analysis of reported associations between PG and various systemic conditions.
• Evaluation of the etiological factors and clinical variants of PG.

Main Results:

• The term "pyoderma" is considered redundant as bacterial infection is unrelated to PG causation.
• The spectrum of systemic diseases associated with PG has significantly expanded.
• Clinical variants of PG are linked to different associated systemic diseases.

Conclusions:

• Pyoderma gangrenosum is not solely a cutaneous manifestation of inflammatory bowel disease.
• The understanding of PG has evolved beyond its initial description, encompassing a broader range of associated systemic conditions.
• Further research into the diverse clinical presentations and associations of PG is warranted.