system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
CA 125 is elevated in all except :
assistant
The correct answer is  CA-125

This is a non-specific tumor marker
CA-125 is a glycoprotein which is normally not produced by ovarian epithelium but may be produced by both malignant and benign epithelial ovarian tumors.
Cut off level of CA-125 is < 35 U/mL.