Since the discrediting of Professor Sir Roy Meadow, who first defined it, Munchausen's has been relabelled as “fabricated or induced illness”. This is a perverse disorder in which an adult invents or deliberately creates a child's illness to draw attention to himself or herself. Even the experts agree that Munchausen's is rare, likely to affect no more than 50 people a year. But campaigners fear that far more people are being accused of it. For the traits of the Munchausen mother are broad enough to cast suspicion on many whose children are genuinely ill. They include a reluctance to leave the sick child's side, familiarity with medical terms and, most devastating, the denial of accusations of abuse.
Family Justice: your word against theirs, Times Online