Gastrointestinal Tract. Small & Large Intestines. Small intestine Duodenum, Jejunum & Ileum Villi & microvilli increase surface area of the mucosa crypts of Lieberkuhn =Between the bases of the villi are pits Normal villus : crypt height ratio ~ 4:1.
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Villus : Crypt
What are these glands?
lacks villi &presence of
numerous goblet cells
neonatal intestinal obstruction
1. Ascaris lumbricoides- MC
3. Hookworm (Necator duodenale and Ancylostoma duodenale)
4. Enterobius vermicularis (pinworms)
5. Trichuris trichiura (whipworm)
PAS+ve granules (tiny rod-shaped bacilli in EM)
1) polyp size ( > 4cm)
2) degree of dysplasia
3) extent of villous component (More villous= more cancerous)