Update

Thanks for the prayers! Leena's surgery went splendidly, she was her cheery, chipper self before and after, and she has had NO post-op pain!  Also, when I asked the surgeon what would be next if the biopsy came back positive, he waved his hand dismissively and said, "Oh, it won't. She's fine."

She is indeed fine, with the world's smallest pirate scar, to boot!