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[单选题]
女,28岁。恶心、呕吐、乏力、头晕1周。近2个月体重减轻,皮肤变黑。查体:BP:90/60mmHg,心率:84次/分,立位BP:75/50mmHg,心率:99次/分,身高:169cm,体重:50kg,皮肤黑,甲状腺I度肿大。心、肺、腹未见异常。实验室检查:血钠:124mmol/L,血钾:5.8mmol/L,血糖:3.5mmol/L.该患者最可能的诊断是()
A.甲状腺功能减退症
B.垂体卒中
C.原发性慢性肾上腺皮质功能减退症
D.慢性肾衰竭
E.真菌感染
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C、原发性慢性肾上腺皮质功能减退症
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