Granulomatous interstitial dermatitis

LEGEND

Findings similar to interstitial granuloma annulare.

Mixed inflammatory infiltrate composed of neutrophils, lymphocytes, and eosinophils.

  • Histiocytes surrounding collagen fibers

Granulomatous interstitial dermatitis

Histiocytes

Lymphocytes

Granulomatous interstitial dermatitis

LEGEND

  • Neutrophils

  • Eosinophils

Granulomatous interstitial dermatitis

Mixed infiltrate

Nuclear dust (karyorrhectic debris)