Acute intermittent porphyria
Symptoms
Are there earlier onset, later onset, or variant forms of acute intermittent porphyria?
Attacks of acute intermittent porphyria very rarely happen in children. Most people don't have an attack until after puberty.
Acute Intermittent Porphyria. Gene Reviews. (http://www.ncbi.nlm.nih.gov/books/NBK1193)