What did Foreman do wrong in the TV series "House" episode TB or not TB?

In this episode, there was a woman who thought she had cancer because she felt a lump in her . Foreman checked it, and said it was benign, and she had nothing to worry about. She demanded a biopsy, and he got one. She complained about how he treated her, and Cuddy made "Foreman" apologize. Those who watch the show understand why I put quotations around Foreman.