| Endoscopic biopsy of the distal duodenum is still the gold standard for diagnosis, showing marked changes in the intestinal mucosa with loss of villi and crypt hyperplasia. |
| The epithelium, often with villi, crypts, and glands, simulates the normal mucosa of the gut. |
| Amniotic fluid, chorionic villi, or fetal serum can be tested for evidence of West Nile virus infection. |
| Unlike the hydatidiform moles, choriocarcinomas and placental-site trophoblastic tumors lack chorionic villi. |
| All details of her woodcarvings, even the villi, or small hairs on the stem of each plant, are done by hand with a knife. |
| Nutrients are absorbed in the small intestine through microscopically elongated villi. |
