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异位ACTH综合征与垂体性库欣病的鉴别诊断 被引量:5

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摘要 临床显示 ,异位促肾上腺皮质激素 (ACTH)综合征患者血浆ACTH水平较垂体肿瘤高 ,同时由于其垂体ACTH分泌受到抑制 ,由垂体外肿瘤产生的ACTH一般不被大剂量地塞米松抑制。甲吡酮抑制皮质醇合成时 ,垂体ACTH腺瘤ACTH分泌增加 ,而分泌ACTH的异位肿瘤不出现此种反应。促肾上腺皮质激素释放激素 (CRH)可刺激大多数垂体腺瘤患者的ACTH释放 ,但在异位ACTH综合征患者则无此作用。异位分泌ACTH肿瘤检测常依赖于胸腹部CT及MRI。依赖垂体ACTH的库欣病患者垂体附近ACTH浓度较被稀释的周围静脉中ACTH高 ,故亦可用两者比值 (IPS/P)对两种疾病鉴别。
出处 《国外医学(内分泌学分册)》 2001年第2期85-88,共4页 Foreign Medical Sciences(Section of Endocrinology)
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