Vertebral hemangiomas are common benign lesions that are usually asymptomatic.
脊柱血管瘤是一种十分常见的良性肿瘤，通常不产生症状。
They are usually asymptomatic when confined to the heart but may produce complications due to embolism to the cerebral or systemic circulation.
血栓局限于心脏时一般并无症状，但栓子脱落到脑血管或体循环将会引起并发症。
Dermatitis herpetiformis (Duhring's disease) presents with intense pruritus and a vesicular eruption. It is associated with a usually asymptomatic gluten-sensitive enteropathy.
疱疹样皮炎（Duhring病）表现为剧烈瘙痒和水疱，常与无症状的谷胶敏感性肠病有关。
Although people with HCM usually display mild symptoms or are completely asymptomatic, up to 1% of affected people succumb to sudden cardiac death (SCD), often with no previous signs of illness.
尽管HCM患者通常仅有轻微症状或完全无症状，但1 %的受累患者发生心脏性猝死(SCD)，而此前往往却没有患病迹象。
Atherosclerosis typically begins in early adolescence, and is usually found in most major arteries, yet is asymptomatic and not detected by most diagnostic methods during life.
动脉硬化最典型的症状适于青少年时期，多发生于重要动脉，而症状不明显或诊断手段不易查出。
Atherosclerosis typically begins in early adolescence, and is usually found in most major arteries, yet is asymptomatic and not detected by most diagnostic methods during life.
动脉硬化最典型的症状适于青少年时期，多发生于重要动脉，而症状不明显或诊断手段不易查出。
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