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    Testicular function after cytotoxic chemotherapy: evidence of Leydig cell insufficiency.

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    Authors
    Howell, Simon J
    Radford, John A
    Ryder, W David J
    Shalet, Stephen M
    Affiliation
    Department of Endocrinology, Christie Hospital National Health Service Trust, Withington, Manchester, United Kingdom.
    Issue Date
    1999-05
    
    Metadata
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    Abstract
    PURPOSE: To evaluate testicular function in men after treatment with cytotoxic chemotherapy. PATIENTS AND METHODS: We measured testosterone, sex hormone-binding globulin (SHBG), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels in 209 men after treatment with mechlorethamine, vinblastine, procarbazine, and prednisone, hybrid chemotherapy, or high-dose chemotherapy and in 54 healthy age-matched controls. RESULTS: The mean age of the patients was 38 years (range, 19 to 68 years), and all patients had received chemotherapy between 1 and 22 years previously. Patients had significantly higher mean LH (7.9 v 4.1 IU/L; P < .0001) and FSH levels (18.8 v 3.1 IU/L; P < .0001) than controls. There was no significant difference in mean total testosterone level between the patients and controls, but there was a trend toward a lower mean testosterone/SHBG ratio in the patients (0.63 v 0.7; P = .08). Analysis of the hormonal parameters using a model that allowed for the effects of increasing age on testicular function showed evidence of significant recovery of gonadal function in the first 10 years after treatment. Fifty-two percent of patients had LH levels at or above the upper limit of normal, and 32% of patients had increased LH with testosterone levels in the lower half of the normal range, suggesting a degree of Leydig cell impairment. CONCLUSION: In a significant proportion of men, there is good evidence of Leydig cell dysfunction after cytotoxic chemotherapy. The clinical significance of this Leydig cell dysfunction is not clear, but some of these men may benefit from testosterone replacement. Further studies are warranted.
    Citation
    Testicular function after cytotoxic chemotherapy: evidence of Leydig cell insufficiency. 1999, 17 (5):1493-8 J. Clin. Oncol.
    Journal
    Journal of Clinical Oncology
    URI
    http://hdl.handle.net/10541/87859
    PubMed ID
    10334536
    Type
    Article
    Language
    en
    ISSN
    0732-183X
    Collections
    All Christie Publications

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