Treatment-related differences in cardiovascular risk factors in long-term survivors of testicular cancer.

OBJECTIVE: Treatment in testicular cancer survivors (TCSs) may be followed by cardiovascular disorders. We have examined whether today's three treatment modalities are associated with a biochemical cardiovascular risk profile.
MATERIALS AND METHODS: In this cross sectional study serum inflammatory markers, atherogenic lipoproteins and gonadal hormones were measured in 589 orchiectomized TCSs who have been treated 5-20 years previously. There were 140 patients treated by surgery alone (SURG), 231 who had had infradiaphragmatic radiotherapy alone (RAD), and 218 who had chemotherapy with or without additional surgery (CHEM).
RESULTS: (1) The RAD group had higher levels of high-sensitivity C-reactive protein and soluble CD40 ligand compared to the SURG group. (2) The CHEM group had lower levels of high density lipoprotein cholesterol and an increased apolipoprotein B/apolipoprotein A-1 ratio than the SURG group. The prevalence of metabolic syndrome was higher in the CHEM group than in the SURG group. (3) Hypogonadism was significantly more prevalent in the CHEM than in the SURG group.
CONCLUSION: Treatment for TC was related to long-term biochemical cardiovascular risk factors by different pathways: Radiation treatment is followed by elevated serum markers of chronic inflammation and endothelial dysfunction, whereas chemotherapy is followed by the development of atherogenic lipid changes and of the metabolic syndrome. This study provides justification for a prospective study of the impact of these treatment modalities on cardiovascular risk in testicular cancer survivors. In the interim testicular cancer survivors should monitor cardiovascular risk over time.