I´ve looked (although not that thoroughly)through the talk boards but I haven´t found anything on children having this.
My ds, aged 16.5 months, developed a sudden bright red rash on his leg (i thought meningitis, as you would), and lots of bruises on his legs. I was in hospital for something else, and a sharp-eyed doctor spotted the marks on his legs (I thought they were just cos he still falls over all the time) and immediately sent him off for a blood test.
Turns out he had ITP - basically, very low level of blood platelets (normally 250-400,000 per something, he had 3,000) and he was rushed to the children´s hospital in an ambulance, given treatment to start producing platelets again, and kept in for 5 days till his platelet levels went back up again (they´re still not at normal levels). We´re back home now, and in for a blood test next week, by which time hopefully they´ll be up to 250,000, then will be monitored regularly for a few months at least.
I had never heard of this, nor would I have known about the symptoms. But if that dr hadn´t been so efficient, ds could have started bleeding spontaneously in his brain, organs, or pretty much anywhere. A bad fall or a cut could have been fatal, as his blood might not have clotted properly.
anyway, I wanted to see a) if anyone else´s ds or dd has had this and b) for other people to be aware of the symptoms to look out for.