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Fig. 13A. —Two cases of microscopic polyangiitis. 4-MDCT image of 43-year-old
man with microscopic polyangiitis that was obtained during intermediate phase
of disease activity (A) and magnified view (B) of A show
bilateral diffuse angiocentric ground-glass nodules (arrowheads),
reflecting capillaritis or accumulation of alveolar macrophages due to minimal
diffuse alveolar hemorrhage. Neither interlobular nor intralobular
interstitial thickening is present.
