If a husband or wife is found to have high blood pressure or diabetes, is this considered a defect that invalidates the marriage?

Question:
Honorable Shaykh, may Allah grant you success. He says: If a husband or wife is found to have high blood pressure or diabetes in the other, is this considered a defect that invalidates the marriage when he knows about it?

Answer:
If this harms her and diminishes her right over him, then she has the option, but if it does not diminish any of her right, then she does not have that option.