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什么叫无功能性垂体瘤

来源:华人健康网 | 发布时间:2010-11-16 13:39:24 | www.chinesejk.com
垂体瘤是比较常见的颅脑肿瘤,约占颅脑肿瘤的5%一10%。在过去,垂体瘤的分类多用染色法检查来确定,根据染色不同分为嗜酸细胞瘤、嗜碱细胞瘤和嫌色细胞瘤。近来由于各种检查方法的建立和不断完善,可以从瘤细胞是否具有分泌激素的能力而分为两大类:功能性垂体瘤和无功能性垂体瘤。功能性垂体瘤依分泌激素的种类分为生长激素瘤、泌乳素瘤、促肾上腺皮质激素瘤、促甲状腺激素瘤及促性腺激素瘤,后2种很少见。功能性垂体瘤还可混合存在,如生长激素瘤十泌乳素瘤。本来认为约占垂体瘤80%的嫌色细胞瘤不具备分泌激素的能力,现在发现不少嫌色细胞瘤也是功能性垂体瘤,它们中约30%一70%是泌乳素瘤。因此,无功能性垂体瘤在垂体瘤中的百分比已大大下降,约占垂体瘤的25%一30%。

(编辑:蔡旭旭 )

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