In both adrenal adenomas and carcinomas, the cells of the zona fasciculata within the adrenal cortex start dividing abnormally and secrete excess cortisol.

在肾上腺腺瘤和肾上腺癌中，肾上腺皮质里束状带的细胞开始异常分裂并分泌过多皮质醇。

Low ACTH levels can be seen in adrenal adenomas and carcinomas, whereas high ACTH levels can be seen in Cushing disease and ectopic ACTH production.

肾上腺腺瘤和肾上腺癌会检测出低水平ACTH，库欣病和异位ACTH综合征会检测出高水平ACTH。

Another common cause of endogenous Cushing syndrome is tumors of the adrenal glands that make excess cortisol - like adrenal adenomas, which are benign tumors, and adrenal carcinomas, which are malignant tumors.

另一种常见的内源性库欣综合征的原因是肾上腺肿瘤导致过多的皮质醇分泌，比如肾上腺腺瘤，一种良性肿瘤，还有肾上腺癌，一种恶性肿瘤。