Chronic nonspecific ulcerative colitis is a disease with exacerbations and remissions.慢性非特异性溃疡性结肠炎这种病可以恶化亦可缓解.Direct laryngoscopy revealed narrowing of the glottis with diffuse ulcerative necrotic tissue.以直达式喉镜发现声门狭窄与广泛性...