How do we define "castration" in men on androgen deprivation therapy?

Area of Science:

• Urology
• Endocrinology
• Oncology

Background:

• Androgen deprivation therapy (ADT) is a primary treatment for advanced prostate cancer.
• Historically, ADT and orchiectomy have been used interchangeably to denote castration.
• Contemporary medical practice requires evaluating the equivalence of different castration methods.

Purpose of the Study:

• To compare testosterone level reduction between surgical and chemical castration.
• To identify optimal methods for measuring testosterone in advanced prostate cancer patients.
• To establish appropriate testosterone cutoff values for defining castration.

Main Methods:

• Systematic analysis and compilation of existing literature.
• Review of studies comparing surgical and chemical castration efficacy.
• Evaluation of methodologies for testosterone level measurement.

Main Results:

• Both surgical and chemical castration lead to comparable reductions in total and free testosterone.
• Free testosterone is a more clinically relevant marker for assessing castration status.
• Specific cutoff values for total testosterone (e.g., 50 ng/dL or 20 ng/dL) require careful consideration.

Conclusions:

• Free testosterone measurement is essential for clinically relevant assessment of castration in advanced prostate cancer.
• Standardized methods and cutoff values are needed for accurate testosterone monitoring during ADT.
• Clinical practice should leverage accurate testosterone assessment for effective prostate cancer management.