Anyone know about melatonin/breast cancer link/cyst on pineal gland?

[CherylS]

I have just stumbled upon an article on WebMD about research done that indicated that a lack of melatonin has been linked to breast cancer. I am particularly curious about this because melatonin is secreted only from the pineal gland. About three years ago, I was discovered to have a cyst on my pineal gland, which they say is of no incidence, however it can disrupt melatonin production and cause insomnia, which I have struggled with. Anybody else out there with a pineal cyst or more info on this?