It started with a 131-character tweet sent Tuesday afternoon.

“All hell's about to break loose. BCBS DENIED Lorelei's transplant. No words for how angry I am. I guess it's cheaper to let her die,” Andrea Decker said via Twitter.

Decker's frustrated tweet came after she and her family learned that Blue Cross Blue Shield of Oklahoma had denied her daughter a cancer therapy that they say would save her life.

The family began a Twitter campaign using the hashtag #ApproveLorelei. Several Oklahoma residents sent hundreds of tweets, using the hashtag to express their feelings regarding the Oklahoma insurance company's decision.