Optimal cutoff level of serum squamous cell carcinoma antigen to detect recurrent cervical squamous cell carcinoma during post-treatment surveillance.

Serum SCC-Ag test was helpful in detecting recurrent cervical squamous cell carcinoma during post-treatment surveillance, and the optimal cutoff value was ≥2 ng/mL. The researchers recommend active imaging studies, when serum SCC-Ag level ≥2 ng/mL during post-treatment surveillance.