I had a friend with similar issues, I think she called it a hyperpermeable colon. She tried all sorts of diets and after a couple years she slowly regained the ability to eat more and more foods.
Sounds like a fancy word for the fanciful "leaky gut syndrome".
https://en.wikipedia.org/wiki/Leaky_gut_syndrome
Not sure why you were downvoted.
As a result, “the scientific community vilified the idea of leaky gut,” Fasano says. Despite the growing body of evidence, many medical practitioners are still coming to grips with the fact that leaky gut is a legitimate contributor to some ailments.
The science is constantly evolving: http://time.com/4178015/leaky-gut-syndrome-probiotics/