虽然这类肿瘤往往会自然消除，但它们会再生，引起畸形，如果堵塞了呼吸道，甚至会危及生命。

Although such tumours are often resolved naturally, they may reoccur and cause deformity, and can be life-threatening if they obstruct the airways.

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虽然这类肿瘤往往会自然消除，但它们会再生，引起畸形，如果堵塞了呼吸道，甚至会危及生命。

Although such tumours are often resolved naturally, they may reoccur and cause deformity, and can be life-threatening if they obstruct the airways.

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