Response

Saiag, Philippe and Aegerter, Philippe and Boniol, Mathieu (2016) Response. Journal of the National Cancer Institute, 108 (4). djw015. ISSN 0027-8874 (https://doi.org/10.1093/jnci/djw015)

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Abstract

We thank Raimondi et al. for their alternative interpretation of our results on the prognostic value of 25-hydroxyvitamin D3 (25[OH]D3) serum level in melanoma patients. With the observation that standardized value of 25(OH)D3 at diagnosis was not a prognostic factor, our major finding was that a change of 25(OH)D3 serum level upon time in both directions was associated with worse disease-free and overall survivals, with U-shaped curves. We postulated that this latter result was unlikely to be a direct consequence of vitamin D biological actions but rather reflected a global instability in patients’ metabolisms, which finally impact 25(OH)D3 serum level by any …