Granuloma Annulare

**Definition:** Benign granulomatous disease of unknown etiology characterized by a ring of localized or disseminated papules or nodules on the skin and palisading histiocytes surrounding necrobiotic tissue resulting from altered collagen structures.

**Tree numbers:** - C17.300.200.495.380 - C17.800.550.380 - C23.550.382.375