Colon cancer Flashcards Preview

SpM Oncology > Colon cancer > Flashcards

Flashcards in Colon cancer Deck (11)
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1
Q

What is the tumour marker for colon cancer?

A

Carcioembyonic antigen (CEA)

2
Q

What are the three forms of colorectal cancer and how common are they?

A

Sporadic (95%)
Hereditary non polyposis colorectal cancer (5%)
Familial adomatous polyposis (1%)

3
Q

What is hereditary non polyposis colorectal cancer?

A

This is the most common form of inherited cancer

It is autosomal dominant and causes poorly differentiate, highly aggressive cancers of the proximal colon

4
Q

What criteria is used to determine the severity of HNPCC?

A

The amsterdam criteria

5
Q

How is familial adomatous polyposis usually managed?

A

Patients usually have a total colectomy in their 20s

6
Q

Where are the common locations in the colon for colorectal cancers?

A

Rectal 40%

Sigmoid 30%

7
Q

What is the screening programme for colorectal cancer?

A

All men and women over 60 to 74 will be send faecal occuclt blood tests through the post
This is every 2 years

8
Q

What abnormalitiy seen on colonoscopy is likely to cause cancer?

A

A polyp

9
Q

How should colon cancer be investigated and staged?

A

With a CT of chest/abdo and pelvis

Entire colon should be evaluated with colonoscopy or CT colography

10
Q

What is the treatment of coloic cancer?

A

Curative is resection, can bring out a stoma temporarily and then go back and try and create an anastomosis
Usually given adjuvant chemo

11
Q

What is the treatment of rectal cancer?

A

Typically an anterior resection and requires a 2cm margin

As the rectum is extraperitoneal it can have neoadjuvant radiotherapy