What is wrong with this sentence? Although they seemed inflamed, the site of the previous craniectomy seemed free of defect.

To what does "they" refer? I don't see any plural word to which it could refer.

craniectomy sounds weird.

I'll have to go with this.

Although they seemed inflamed, the site of the previous craniectomy seemed free of defect.What type of agreement error in a sentence is this?

Based on the sentence you provided, it appears that there might be a grammatical error. Let's analyze the sentence to find out.

The sentence structure seems to be correct, but it contains a spelling mistake. The word "site" should be spelled as "sight." Therefore, the corrected version of the sentence would be:

"Although they seemed inflamed, the sight of the previous craniectomy seemed free of defect."

To identify this error, one can carefully proofread the sentence and pay attention to the spelling of each word. In this case, "site" instead of "sight" is the mistake. Additionally, grammar and punctuation should also be checked to ensure the sentence is correct.