Percutaneous testicular sperm aspiration (TESA) has been known for decades as a simple, minimally invasive approach to sperm retrieval in azoospermic men. Because of lower reported sperm retrieval rates (SRR) when compared with microdissection testicular sperm extraction (mTESE), many centers now use mTESE as the first choice for retrieving spermatozoa in nonobstructive azoospermia (NOA). Objectives of this study were to evaluate the outcome and safety of TESA and mTESE in the treatment of azoospermia and to investigate the usefulness of a prognostic TESA to individualize protocols for couples and limit the use of invasive testicular procedures. IRB approval was obtained to retrospectively evaluate 208 patients undergoing multiple needle-pass TESA between 1999 and 2014. Prognostic TESA was performed on 125 men with NOA and 82 with obstructive azoospermia (OA). Nine NOA men and 31 OA men with previously demonstrated spermatozoa had a subsequent therapeutic TESA while nine NOA men with a failed TESA proceeded to mTESE. Main outcome measures were complication rates and SRR. SRR of the prognostic TESA was 30% (38/125) for NOA men and 100% (82/82) for OA men. Eight/nine NOA men and 31/31 OA men had spermatozoa found for intracytoplasmic sperm injection in a subsequent therapeutic TESA. In nine NOA men in whom a TESA produced no spermatozoa, only one had spermatozoa found with mTESE. Overall complication rates of TESA and mTESE were 3% (7/267) and 21% (3/14), respectively. TESA provides reasonable SRR and is a safe procedure. Successful prognostic TESA indicates future success with therapeutic TESA. Men with a failed TESA have a limited chance of sperm retrieval using mTESE. Approaching azoospermic men with an initial prognostic TESA followed by either therapeutic TESA and/or mTESE is an efficient algorithm in the management of azoospermia and limits the use of more invasive procedures.
Keywords: TESE/TESA; azoospermia; infertility; sperm retrieval.
© 2016 American Society of Andrology and European Academy of Andrology.