Ch. 33 Colorectal Cancer PP Flashcards Preview

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Flashcards in Ch. 33 Colorectal Cancer PP Deck (15)
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1

most common histology type

adenocarcinoma

2

2nd most common histologic type

mucinous adenocarcinoma

3

histologic types with the worst prognosis

signet ring cell and squamous cell carcinoma

4

most common staging system for colorectal cancer

TNM

5

two most important prognostic indicators for survival

# of positive nodes
depth of penetration through the bowel wall

6

classification according to the level of invasion into bowel wall and absence or presnece of positive nodes

Dukes staging

7

describe dukes A to C

A: not penetrated through bowel wall
B: penetrated through bowel wall, negative nodes
C: positive nodes

8

colorectal routes of spread

direct extension,
lymphatics,
blood, and
peritoneal seeding

9

most come site of blood borne distant spread

liver

10

second most common distant spread

lung

11

two most comes rectal cancer surgeries

low anterior resection
abdominoperineal resection

12

- removal of tumor plus a margin and immediately adjacent lyph nodes
- bowel reanastomsed, no colostomy

low anterior resection

13

- Performed if cancer located in lower 1/3 of rectum (distal 5cm)
- Requires a colostomy
- Rectum, anus, and draining lymphatics pulled out through perineal opening
- Requires a reconstruction of the pelvic floor using absorbable mesh, omentum or peritoneum

abdominoperineal resection

14

OAR when treating the pelvis

small bowel

15

OAR when treating ascending or descending colon

kidney