Ruptured gastric artery aneurysm: An uncommon manifestation of microscopic polyangiitis

Figure 1 Radiological and pathological findings of the gastric artery aneurysm. A: Abdominal computed tomography (CT) showing a hematoma in the lesser omentum (arrow); B: CT angiography showing the aneurysm of the left gastric artery (arrow); C: Surgical specimen of the stomach. In addition to the hematoma in the lesser omentum (arrows), marked subserosal hemorrhage is seen; D: Histological findings of the aneurysm. The primary pathologic change is dissection and fragmentation of the arterial wall. No inflammatory change is seen (Elastica van Gieson stain; original magnification, × 20).

Figure 2 Representative histological findings in the autopsy samples. A: Cryptococcus in the lung (Grocott stain, original magnification, × 400); B: Necrotizing glomerulitis (Hematoxylin-eosin, original magnification, × 400); C: Necrotizing arteritis of the urinary bladder (Hematoxylin-eosin, original magnification, × 40).