Abstract:
BACKGROUND:Because patients with germ cell tumors expect an additional life span of around 50 years after successful treatment, attention is now focused on potential long term toxicity. Limited data are available on Leydig cell function in long term survivors. METHODS:The authors measured testosterone, sex hormone binding-globulin (SHBG), luteinizing hormone (LH), and follicle-stimulating hormone (FSH) levels in 244 patients with germ cell tumors. Patients were divided into three groups: Group 1 had received no chemotherapy (n = 58 patients), Group 2 had received cumulative doses of cisplatin < or = 400 mg/m(2) (n = 117 patients), and Group 3 had received cumulative doses of cisplatin > 400 mg/m(2) (n = 69 patients). The median times from chemotherapy were 74 months and 75 months in Groups 2 and 3, respectively. RESULTS:Subnormal testosterone levels (< 10 nmol/L) were found in 5%, 11%, and 20% in Groups 1, 2, and 3, respectively (Group 1 vs. Group 3; P = 0.02). The mean testosterone level and the testosterone/SHBG ratio did not differ significantly between Groups 1 and 2; however, they did differ between Groups 1 and 3 (testosterone: 17.0 nmol/L vs. 14.9 nmol/L, respectively; P = 0.02; testosterone/SHBG ratio: 0.70 vs. 0.59; P < 0.05). There was a significant inverse correlation between the testosterone/SHBG ratio and LH (correlation coefficient [r] = -0.25; P = 0.0002). A significant positive correlation was found for LH and FSH (r = 0.78; P < 0.0001), indicating a strong association between Leydig cell dysfunction and germinal epithelial damage. CONCLUSIONS:Standard doses of cisplatin-based chemotherapy do not lead to a significant deterioration of Leydig cell function in long term survivors of germ cell tumors. In contrast, high cumulative doses of chemotherapy cause a significant and persistent impairment of Leydig cell function. More data are needed regarding the clinical relevance of moderate testosterone deficiency. Further research is necessary to determine whether some patients may benefit from testosterone replacement.
journal_name
Cancerjournal_title
Cancerauthors
Gerl A,Mühlbayer D,Hansmann G,Mraz W,Hiddemann Wdoi
10.1002/1097-0142(20010401)91:7<1297::aid-cncr1132subject
Has Abstractpub_date
2001-04-01 00:00:00pages
1297-303issue
7eissn
0008-543Xissn
1097-0142pii
10.1002/1097-0142(20010401)91:7<1297::AID-CNCR1132journal_volume
91pub_type
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