四八
(1)颈部非甲状腺包块中,肿瘤占80%,多于炎症及先天性畸形;
(2)在肿瘤中,恶性者占80%,多于良性;
(3)在恶性肿瘤中,转移来源者占80%,多于颈部原发;
(4)在转移性恶性肿瘤中,原发灶80%位于锁骨上,多于来自锁骨下。
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