(ABCNEWS.GO) — For more than a year, Rosemary McGinn’s coworkers used to think she was drunk. Or crazy.

In reality, she had a rare tumor on her pancreas that was causing her blood sugar to plummet, starving her brain of fuel.

“What happened was I noticed a few times I would get weird,” McGinn, a 54-year-old realtor from Rockland County, N.Y., told ABCNews.com. “I felt just not myself. I couldn’t explain it to anybody else.”

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