A Tale of Two Tongues

Brothers present with residual findings from a bad bout of lower GI distress. Their tongues will speak for themselves. What's your Dx?

In Monday morning clinic you are presented with 10- and 18-year-old brothers who recently missed nearly a week of school for similar lower GI symptoms. Their mother was concerned and took them to the ED where they were examined, discharged, and referred to primary care for follow-up.They look well now but there is one odd finding seen in both boys and a second one noted in the 10-year-old. Walk through the case inthe slides above. Can you figure this one out?