E-Letter responses to:

n-focus: Jennifer Couzin ONCOLOGY: In Their Prime, and Dying of Cancer Science 2007; 317: 1160-1162 [Summary] [Full text] [PDF]

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Published E-Letter responses:

Could Hormone Levels Play a Role?

Burkhard Haefner   (5 October 2007)

Could Hormone Levels Play a Role? 5 October 2007
Burkhard Haefner, Anti-cancer drug discovery J&J Respond to this E-Letter: Re: Could Hormone Levels Play a Role?	In the News Focus article, "In their prime, and dying of cancer" (31 August 2007, p. 1160), you explain that the reasons for the significantly higher cancer survival rates of people under age 15 and over 40 are still largely a mystery. One parameter that distinguishes pre-pubescent children of below 15 years of age from older, pubescent adolescents, are sex hormone levels. These are also likely to fall off when adults have gone past their years of maximum fertility, which is at above 40 years of age. I wonder if these hormones could possibly play a role in this disturbing phenomenon. Burkhard Haefner