Improving protection against proximal colon cancer by colonoscopy

Figures & data

Figure 1. The Paris classification for shape of colorectal polyps and flat lesions.

Dotted lines represent 2.5 mm of elevation above the normal mucosal surface.

Figure 2. Endoscopic photographs of serrated lesions in the colon.

(A) White light photograph of two serrated lesions in the transverse colon. Note the mucus covering on the lesions. The color is similar to the surrounding mucosa, and the lesion obscures the vascular pattern of the normal colon. (B) Narrow-band imaging photograph of a serrated lesion. The mucus cap has a pink colon.

Figure 3. Photodocumentation of the right colon.

(A) Appendiceal orfice. (B) Ileocecal valve. (C) Terminal ileum. (D) Ascending colon in retroflexion.

Table 1. Distribution of colorectal mucosal lesions by histology and shape.

Histology	Shape (Paris)	Predominant location
Adenoma	Pedunculated (1p) Sessile (1s) Flat (2a) Depressed (2c)	Left colon Throughout colon Right colon Right colon
Serrated lesion: Hyperplastic SSA/P TSA	1s and 2a 1s and 2a 1s and 1p	Left colon Right colon Left colon

SSA/P: Sessile serrated adenomas/polyp; TSA: Traditional serrated adenoma.

Activity Evaluation: Where 1 is strongly disagree and 5 is strongly agree

	1	2	3	4	5
1. The activity supported the learning objectives.
2. The material was organized clearly for learning to occur.
3. The content learned from this activity will impact my practice.
4. The activity was presented objectively and free of commercial bias.