By Jethro Nededog LOS ANGELES (TheWrap.com) – Monica Potter's journey through the experiences of a mom with cancer on NBC's "Parenthood" actually began with her own medical scare. "When I went in last year for a mammogram, my first one, they said they found something," Potter told TheWrap. On the heels of the discovery, the 41-year-old mother of three went home and emailed executive producer Jason Katims, pitching a cancer storyline in the show's fourth season for her character Christina. …

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