Testicular Core Extraction: Important Technique for Determining Sperm Retrieval Method in Non-obstructive...

Non-obstructive azoospermia (NOA) presents a diagnostic and therapeutic challenge in male infertility. Current sperm retrieval methods include clinic testicular extraction (cTESE) and microscopic testicular sperm extraction (mTESE). While both techniques aim to recover sperm for assisted reproduction, they differ in cost and procedural complexity. Prior research has established that mTESE is more effective in NOA cases but is also more resource-intensive. However, no prior work had resolved how to best select patients for these procedures to optimize outcomes and reduce costs. This gap motivated the investigation of a preliminary diagnostic step—testicular core extraction (TCE)—to guide the choice between cTESE and mTESE. The uncertainty around TCE’s predictive value in this context led to the need for a study evaluating its role in clinical decision-making. Understanding the diagnostic accuracy of TCE could improve patient outcomes and reduce unnecessary procedures. This paper contributes by analyzing TCE’s ability to inform the selection of the most appropriate sperm retrieval method. The findings may help clinicians make more informed decisions for NOA patients.

The aim of this study was to evaluate the utility of testicular core extraction (TCE) as a diagnostic tool for guiding the selection of either cTESE or mTESE in men with non-obstructive azoospermia (NOA). The specific problem addressed is the lack of a reliable method to determine which patients are likely to benefit from cTESE versus mTESE. The motivation for this study stems from the need to reduce both financial costs and procedural complexity for patients. By using TCE as a preliminary step, the researchers sought to identify which patients are more likely to achieve successful sperm retrieval with cTESE versus mTESE. The study also aimed to calculate the sensitivity, specificity, and predictive values of TCE in predicting successful sperm retrieval. Additionally, the researchers evaluated the cost-effectiveness of using TCE to guide treatment decisions. This approach could help optimize clinical outcomes while minimizing unnecessary procedures.

The study analyzed data from men with non-obstructive azoospermia (NOA) who underwent testicular core extraction (TCE) between 2018 and 2022. Patients were categorized based on whether sperm was found in the TCE sample. Those with positive results were recommended for clinic testicular extraction (cTESE), while those with negative results were recommended for microscopic testicular sperm extraction (mTESE). The researchers calculated the sensitivity, specificity, positive predictive value, and negative predictive value of TCE in predicting successful sperm retrieval. They also assessed the success rates of cTESE and mTESE following TCE results. Cost reductions were determined based on institutional fees. A nonparametric Wilcoxon test was used to compare outcomes between the two groups. The study focused on evaluating TCE’s role in guiding clinical decisions rather than comparing the two extraction techniques directly.

Of the 82 NOA patients who underwent TCE, 51 (62.2%) had sperm detected in the core biopsy, while 31 (37.8%) did not. Among the 35 men who underwent cTESE after a positive TCE result, the sperm retrieval rate (SRR) was 97.1%. For the 8 men who underwent mTESE after a negative TCE result, the SRR was 75%. The positive predictive value of TCE for successful TESE outcomes was 94.4%. The overall treatment success rate of TCE combined with cTESE was 79.1%. The study also found a cost reduction of 59.4% when using TCE to guide the choice between cTESE and mTESE. These results suggest that TCE can serve as a reliable indicator of which patients are more likely to benefit from each procedure. The Wilcoxon test confirmed statistical significance between the two groups. These findings support the use of TCE as a diagnostic tool in clinical practice.

The authors suggest that testicular core extraction (TCE) can serve as a valuable diagnostic tool to guide the decision between clinic testicular extraction (cTESE) and microscopic testicular sperm extraction (mTESE) in men with non-obstructive azoospermia (NOA). They propose that TCE helps identify which patients are more likely to achieve successful sperm retrieval with either method. The study’s findings indicate that TCE has a high positive predictive value, which may help clinicians make more informed choices. The authors also suggest that using TCE can reduce both financial burden and procedural complexity for patients. They emphasize that TCE may help maximize sperm retrieval rates while minimizing unnecessary procedures. The study does not claim that TCE is essential for all cases but suggests it is important for guiding treatment decisions. The authors propose that TCE can improve clinical outcomes by helping to select the most appropriate sperm retrieval method for individual patients.