The patient is a 2-year-old Caucasian boy with acute acalculous cholecystitis (AC) but none of the predisposing factors that are typically found in patients with this disease. The presentation and clinical course of the disease was typical of AC. Nonsurgical intervention resulted in resolution of the child's initial symptoms. After recurrent bouts of biliary colic over the ensuing ten weeks, fu...

When Bob was twenty-two months old, I could not, by any of the usual methods, or even by any means which I could devise myself, find any evidence that his memory span was more than two. There were, in fact, times when it did not appear to be even quite two. Sometimes he would repeat two digits after me correctly, but he was as likely as not to get the order of the digits reversed. He could some...