Abstract
Bilateral testicular biopsies were performed on 25 boys between 4 and 16 years old with the diagnosis of acute lymphocytic leukemia after the induction of regression with vincristine and prednisone, followed by cyclic maintenance therapy with a combination of 6-mercaptopurine, methotrexate, L-asparaginase, cyclophosphamide and doxorubicin for 2 years. These drugs were given in accordance with children’s cancer study group protocols. Only 3 boys had positive biopsies (12 per cent), although post-treatment testicular morphology was abnormal in the overwhelming majority. Interstitial fibrosis was present in 16 children (70 per cent), basement membrane thickening in 12 (50 per cent) and, most importantly, a reduction in the tubular fertility index of greater than 50 per cent in 20 (80 per cent). There was no relationship between the abnormal morphology encountered and the age of the patient when treated. Most of these changes may be reversible with time but only a biopsy at a later date can establish the long-term effects of treatment on testicular morphology and, perhaps, help to predict future fertility potential.
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