Abstract
Purpose
Prostate cancer is the most common tumor in men. To the best of our knowledge a systematic assessment of bone and mineral abnormalities has not been performed in prostatic cancer patients consecutively enrolled.
Methods
This study was therefore carried out to investigate changes of skeletal and mineral metabolism in patients with prostate cancer (n = 69). A population of patients with cancer of various origin was also investigated as a control group (n = 53), since a comparison with non-prostate cancer patients has not been previously reported.
Results
In the prostatic cancer group, one patient had extremely high values of C-terminal Fibroblast Growth Factor 23, low values of tubular reabsorption of phosphate and very high values of bone alkaline phosphatase, suggesting the diagnosis of oncogenic osteomalacia. We found nine patients with primary hyperparathyroidism in the group of prostate cancer vs. only one in cancer patients group (p < 0.026). We stratified the population on the basis of Gleason score, prostate specific antigen and hormonal therapy. Using a generalized linear model with a logit link to predict the probability of developing primary hyperparathyroidism, only Gleason score, C-terminal fibroblast growth factor 23 and hormonal therapy had a significant effect (p < 0.05). Controlling for other covariates, a rise in fibroblast growth factor 23 increases the odds of developing primary hyperparathyroidism by 2% (p = 0.017), while patients with higher values of Gleason score have a much greater probability of developing primary hyperparathyroidism (log-odds = 3.6, p < 0.01). The probability decreases with higher values of Gleason score while on hormonal therapy; a further decrease was observed in patients on hormonal treatment and lower values of GS. Finally, lower grade of Gleason score without hormonal therapy have a significant protective factor (p < 0.01) decreasing the odds of developing primary hyperparathyroidism by 8%.
Conclusion
We showed a remarkable prevalence of primary hyperparathyroidism in men with prostate cancer; the multivariate analysis demonstrates that higher aggressiveness of prostate cancer, as determined by Gleason score, is a significant predictor of increased risk of developing primary hyperparathyroidism.
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This work was supported by public fund (“Sapienza” Rome University, Bando Ricerca Scientifica, 2015).
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The authors declare that they have no competing interests.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Informed consent was obtained from all individual participants included in this study.
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Francesco Minisola and Cristiana Cipriani contributed equally to this work.
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Minisola, F., Cipriani, C., Colangelo, L. et al. Mineral metabolism abnormalities in patients with prostate cancer: a systematic case controlled study. Endocrine 59, 338–343 (2018). https://doi.org/10.1007/s12020-017-1351-0
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DOI: https://doi.org/10.1007/s12020-017-1351-0