3. Infant boy with refractory diarrhea and failure to thrive. Laparotomy & small bowel biopsy were done--

"TUFTING" ENTEROPATHY (PRIMARY SMALL INTESTINAL EPITHELIAL DYSPLASIA)

(Mouse-swipe link below, right-click, & choose "Open Link")
https://en.wikipedia.org/wiki/Congenital_tufting_enteropathy