Histopathologic vasculitis from the periulcer edge: A retrospective cohort study

Area of Science:

• Dermatology
• Pathology

Background:

• Histopathologic vasculitis is frequently observed in periulcer specimens of leg ulcers.
• The clinical significance and diagnostic utility of this finding remain unevaluated.

Purpose of the Study:

• To assess the sensitivity, specificity, and predictive values of histopathologic vasculitis in periulcer edge specimens.
• To determine the diagnostic accuracy of periulcer vasculitis for identifying ulcers caused by cutaneous vasculitis.

Main Methods:

• Retrospective chart review of patients with leg ulcers (2009-2016).
• Histopathologic slides were reviewed by two blinded dermatopathologists.
• Focal vasculitis was defined as involvement of fewer than three vessels.

Main Results:

• Vasculitis was present in 51.6% of periulcer specimens.
• Focal vasculitis was observed in 71.9% of positive cases.
• Periulcer vasculitis demonstrated high sensitivity (100%) but low specificity (50.9%) for diagnosing vasculitis-induced ulcers.

Conclusions:

• Focal vasculitis at the periulcer edge is a nonspecific finding.
• It offers limited diagnostic value for determining the etiology of lower leg ulcers.
• Diagnosis requires integrating clinical history, examination, histology, and laboratory findings.