Figure 1: Nomogram of the clinical prediction model for success rate of Micro-TESE. The nomogram predicts the probability of successful sperm extraction in patients undergoing Micro-TESE based on the age of orchidopexy, location and severity of cryptorchidism, and the dominant testicular volume. Instructions are described as follows: find the patient's age of orchidopexy on its axis and draw a line straight upward to the “point” axis. The corresponding location on “point” axis determines how many points of the probability of successful sperm extraction the patient obtains for his “age” value. Repeat the process for each additional variable. Sum the points of all predictors and locate the final points on the total point axis. Finally, map the point to the “Probability” axis by drawing a line straight down to determine the patient's probability of successful Micro-TESE. Micro-TESE: microdissection testicular sperm extraction.