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Testosterone (T), 17-hydroxyprogesterone (17P) and cortisol (F) plasma levels have been measured in two groups of prepubertal boys before and during surgery under general anaesthesia (Group 1) and epidural anaesthesia (Group 2) respectively. The mean plasma levels of T, 17P and F increased significantly (P less than 0.05; P less than 0.001; P less than 0.005, respectively) during surgery in Group 1; in Group 2 the plasma levels of T and F did not show any significant variation, whereas 17P significantly increased (P less than 0.05). However the mean level reached by 17P in Group 2 was significantly lower (P less than 0.005) than that observed in Group 1. No significant variation of LH and FSH plasma levels was observed in either group. Our report suggests that the modifications of T and 17P plasma levels observed during surgery under general anaesthesia (GA) are probably due to the stress induced adrenal response. This response can be inhibited or reduced by epidural anaesthesia (EA).
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