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Figure 1 : (a) Interstitial pattern in GA— histiocytes dissecting between collagen bundles and areas of normal dermis intervening (H and E, ×40). (b) Sarcoidal granulomas in GA (H and E, ×200). (c) Mucin identified without special stains: grey-blue, stringy material between collagen bundles (H and E, ×200). (d) Small-vessel vasculitis as evidenced by fibrinoid necrosis of vessel walls and surrounding neutrophils, nuclear debris (H and E, ×400). (e) Elastophagocytosis: multinucleate giant cells with engulfed elastic fibers (H and E, ×400)

Figure 1 : (a) Interstitial pattern in GA— histiocytes dissecting between collagen bundles and areas of normal dermis intervening (H and E, ×40). (b) Sarcoidal granulomas in GA (H and E, ×200). (c) Mucin identified without special stains: grey-blue, stringy material between collagen bundles (H and E, ×200). (d) Small-vessel vasculitis as evidenced by fibrinoid necrosis of vessel walls and surrounding neutrophils, nuclear debris (H and E, ×400). (e) Elastophagocytosis: multinucleate giant cells with engulfed elastic fibers (H and E, ×400)