Colon Cancer Flashcards
Rectum
15cm
7cm are intra-peritoneal
Anus
4.2cm ( 3-5.3cm)
Anatomical anus :
up to marginal line
Chances of synchronous lesion on colonoscopy
6-8%
If not performed before, 3 months after Surgery
CEA
most likely correlated with advanced disease, but absent in 50% of cases
% that have metastatis at presentation
20
PET CT
not routinely recommended
Tumor in Caecum, Ascending Colon
Right hemicolectomy
High ligation of :
- ileocolic
- right colic
Tumor in Transversum
Right or left extended
- including middle colic artery
Sigmoid cancer
- Left hemicolectomy
Sigmoid colectomy
Number of lymph nodes for correct staging
12
Node positive (Stage) Colon
III adjuvant therapy (FOLFOX 6 months)
Surveillance post operative for T3 or greater
CEA
- every 3 months for the first 2 years
- every 6 months for the following 3 years
- CT yearly
Surveillance post operative
at 1 year or within 6 months if incomplete pre op
Colon : Adjuvant therapy for
Stage III or Stage II with risk factors:
- poorly differentiated
- lymphovascular invasion
- bowel perforation
- inadequate tumor margins
- T4 lesions
- low nodal count
T1
submucosa