+1 trusting Dr. Sattar ~ "Dysplasia is reversible, in theory, with alleviation of inciting stress. If stress persists, dysplasia progresses to carcinoma (irreversible)."
Rule in medicine/real life is 'always' never really equals always.
But in Step 1 land, yes, dysplasia is always reversible. That's a point students frequently get wrong. Only once you get to neoplasia is it irreversible.