What would be the next step if a patient’s serum testosterone remains above 40 several weeks after the initial dose of a GnRH agent in the treatment of prostate cancer?
How do you determine if the GnRH injection was a treatment failure?
2 Answers
Mednet MemberInvited Expert
Medical Oncology · Mary Lanning Healthcare Morrison Cancer Center/University of Nebraska Medical Center Adjunct Faculty
Answered on
Real-world data show that approximately 3-7% of patients experience breakthroughs above 40 ng/dL per patient course, while 6.6% experience breakthroughs above 32 ng/mL (1.1 nmol/L). When using the lower threshold of 20 ng/dL (0.7 nmol/L), breakthrough rates increase to approximately 41%. One large r...
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Mednet Member
Medical Oncology · IHA Hem Onc Consult
Answered on
Agree with Dr. @Dr. First Last. My simplified approach:
- Testosterone is repeatedly above goal: switch to an LHRH antagonist (I find relugolix convenient).
- Testosterone is above goal towards the end of the LHRH agonist dosing interval: in this case, the treatment is not lasting long enough. You can ...
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