男性,38岁,颈部肿块2个月,无痛,生长速度快,位于胸锁乳突肌周围,锁骨上三角处,肝脾肿大,纵隔淋巴结肿大应考虑为( )
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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