Is testicular microdissection the only way to retrieve sperm for non-obstructive azoospermic men?

Area of Science:

• Reproductive Medicine
• Urology
• Andrology

Background:

• Non-obstructive azoospermia presents a significant challenge for male infertility.
• Intracytoplasmic Sperm Injection (ICSI) with testicular sperm retrieval offers a chance for biological fatherhood.
• Sperm recovery rates (SSR) are around 50%, necessitating optimized retrieval techniques.

Purpose of the Study:

• To review and compare historical and current surgical techniques for testicular sperm retrieval.
• To discuss the advantages and disadvantages of each method in the context of non-obstructive azoospermia.
• To evaluate the current gold standard, Testicular Microdissection (TM), against other methods.

Main Methods:

• Review of existing literature on various sperm retrieval techniques.
• Comparison of conventional Testicular Sperm Extraction (c-TESE), Testicular Sperm Aspiration (TESA), Testicular Fine Needle Aspiration (TfNA)/c-TESE, Testicular Microdissection (TM), and Open Testicular Mapping (OTEM).
• Analysis of procedural details, reported SSR, and tissue impact for each method.

Main Results:

• Historically, c-TESE and TESA have been used, with TfNA introduced for assessing sperm production.
• TM, a microsurgical approach, became the gold standard due to potentially superior SSR and minimal tissue removal.
• Challenges in TM include extensive dissection and variability in results, prompting re-evaluation against other techniques like OTEM.

Conclusions:

• No single technique is universally superior for all cases of non-obstructive azoospermia.
• The choice of technique should consider individual patient factors and the expertise of the clinician.
• Further comparative studies are needed to definitively establish the optimal sperm retrieval strategy.