CIN 2 lesions often clear up on their own, but can also progress to CIN 3 lesions. CIN 3 is the most severe. It's a very slow-growing disease, though: fewer than half of CIN 3 lesions will have become cancer within 30 years.

How long does it take for CIN 2 to go away?

In a meta-analysis of 36 studies (both randomized trials and observational studies) including 3160 patients with CIN 2, at 24 months, lesions regressed in 50 percent of patients, persisted in 32 percent, and progressed to CIN 3+ in 18 percent [14].

How long does it take for CIN 2 to regress?

Conclusion: CIN2 lesions regress without treatment in one year, although an ablative procedure is more effective.