Abstract
Testicular function was evaluated in 8 boys with acute lymphoblastic leukemia (ALL) and testicular relapse following another course of intensive chemotherapy with unilateral or bilateral orchidectomy and/or testicular irradiation. LH- and FSH-secretion was studied in all using a standardized LHRH-test. In addition, a HCG-test was performed in 6 boys. In prepuberty, all boys examined showed normal LH- and FSH-values. Beginning at 9 to 10 years, elevated basal and/or stimulated LH- and FSH-values were occasionally noted in contrast to the consistently elevated values after the age of 12. Using the HCG-test, we found a testosterone response only in patients receiving gonadal irradiation of 1 100 and 1 500 rads (2 patients). No response was elicited in those with radiation doses of 2 400 and 3 000 rads. We conclude that high dose gonadal irradiation and chemotherapy cause temporary and possibly permanent impairment of spermatogenesis and Leydig cell function in boys with ALL and testicular relapse.
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