One of the biggest challenges in working in child protection is the knowledge that the cases you see represent only a portion of what is out there. Sure, there are cases that are exaggerated, fabricated, over emphasized - but they are not the majority. Most cases are legitimate and in need of intervention.
Child sexual abuse is one of those areas where getting the story told is challenging. This is partly because the abuser holds such power over the victim. The victims are often voiceless because if they tell, then they believe that something very bad will happen in the family. After all, this is what the abuser has told them.
Some commentary out of Scotland lends credence to the view that most child sexual abuse remains hidden. Here is the link to the story (copy the link into your browser)