This quote is from page 54 of Classical Medical Astrology – Healing with the Elements by Oscar Hofman, published by Wessex Astrologer 2009.
“There is a remarkable parallel between the planets as the seven dynamic forces of creation and the seven most important glands in the body. Glands are pre-eminantly the contact points between the psyche and the body and they have an important overall function in the human body/mind system. The seven planetary forces are expressed in these glands, and they are the points at which the planets clearly touch the human organism. In top-down order these important glands are: pineal gland, pituitary gland, thyroid gland, thymus, pancreas, adrenal glands and sexual glands.”
This is one of the best and easiest to read books on medical astrology that I have encountered.