英语语法分析

But my calcium surplus was caused by a common condition called primary hyperparathyroidism.

不过我的钙质超标是由原发性甲状旁腺功能亢进引起的。

Here is a parathyroid adenoma, which is the most common cause for primary hyperparathyroidism.

甲状旁腺腺瘤是引起原发性甲状旁腺功能亢进最常见的原因。

Such lesions are nowadays uncommon because hyperparathyroidism is treated before such lesions develop.

现今这种病变不常见，因为它出现之前甲状旁腺功能亢进已被治愈。