Aetiologies of ileal villous atrophy in the absence of jejunal villous atrophy
| Common variable hypogammaglobulinaemia |
| Radiation enteritis |
| Laxative abuse |
| Backwash ileitis during ulcerative colitis |
| Crohn’s disease |
| Alpha-chain disease |
| Graft versus host disease |
| Atrophy in the reservoir after ileoanal anastomosis |
| Enterocystoplasty |
| Primary ileal villous atrophy (PIVA) |