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Colon Carcinoma

Posted Jun 02 2009 4:40pm

Colorectal Cancer (CRC) is a common, lethal, and preventable disease

CRC is the second leading cause of cancer death in both sexes, accounting for 10 to 11 percent of cancer deaths overall; it is third most common in men and women separately. Approximately one in three people who develop CRC die of this disease.

Colorectal Cancer is another frequent neoplasia in the republic of El Salvador representing the fourth most frequent Cancer according to national statistics, with its incidence on the rise. The clinical course of colon cancer is usually silent and initially without symptoms until the disease has reached an advanced stage. In order to find cancerous or pre-cancerous lesions video-colonoscopy is recommended at 5 year intervals, for any person 30 years and up. For patients with family history of colon cancer or colon polyps a yearly screening is advised. Unfortunately, most people do not follow these recommendations, putting themselves at risk of dying of colon cancer or living with bothersome cololostomy for the rest of their lives. One of the main purposes of the colonoscopy is the screenning for polyps. Polyps are small or medium sized tumors which grow without symptoms some of them may evolve into cancer.if these are detected early they can be removed endoscopicaly with a procedure call at an early, curable stage a total polypectomy.

Colorectal Cancer
Adenoma-carcinoma sequence — Most colorectal cancers arise from adenomatous polyps, some of which progress from small ( <5>1.0 cm), and then to dysplasia and cancer. This progression probably takes at least 10 years in most people; the distribution of progression times is not precisely known because polyps are ordinarily removed when they are found. Neoplastic changes are accompanied by, and probably result from, an accumulation of genetic defects. Some cancers also apparently arise from adenomas that are not polypoid.Large flat adenomas were more likely to contain dysplastic changes than small ones, as is the case for polypoid adenomas. The true proportion and clinical significance of adenomas that are flat is uncertain.

Two-thirds of polyps are adenomas. The prevalence of adenomas is about 25 percent by age 50 and 50 percent by age 70. Large adenomatous polyps (>1 cm), the size most likely to progress to cancer, are less common (3 to 5 percent) than small adenomas.

The risk of CRC increases with polyp size, number, and histology (eg, villous worse than tubular architecture). The characteristics of an individual polyp are a marker for the colon as a whole; thus, the polyp examined is representative of the individual's propensity to form polyps and cancer.

A cancer is an uncontrolled proliferation of cells.
Is very common, usually occurring after the age of 50. The existence of polyps (protrusions of tissue from the wall of the bowel into the lumen) generally precedes the development of colorectal cancer. Polyps are painless but can bleed, causing blood to be present in the stool. The progression to cancer usually does not occur until after the age of 40 unless there is a genetic-linked familial disorder. Routine medical examination helps detect colorectal cancer at early stages, thereby improving the likelihood of successful treatment. Simple tests to chemically detect small amounts of blood in the stool that are not visible to the eye can be easily performed in the home.
Both polyps and colon cancer occur much more frequently in Western societies where the diets are low in fruits, vegetables, protein from vegetable sources and fiber. Smoking and drinking alcoholic beverages appear to increase the risk of polyp formation. Evidence suggests that diets high in calcium, folic acid and fiber act as chemopreventive agents, reducing the risk of colorectal cancer. There is evidence that use of some nonsteroidal anti-inflammatory drugs (NSAIDs) prevents polyp progression to cancer in certain people.

Determining risk — Before deciding how to screen, clinicians should decide whether the individual patient is at average or increased risk. A few simple questions are all that is necessary: Do you have a family history of colorectal cancer? If so, in first degree relatives, at what age of onset, and how many?

Have you had a personal history of colorectal cancer or adenomatous polyps?
Have you had inflammatory bowel disease?
The patient is considered average risk if the answer to all these questions is "no." Patients answering yes to any of these questions need to be evaluated further.

Click the Image to appreciate the video clip.
Colonoscopic Image.
Rectal Carcinoma, 86 Year old female with rectal bleeding
Please click the image to download the video clip and configure the media player in
reapeat and press Alt + Enter to see full screen.(Windows Media) and for Real Player Ctrl and 3.

Summary Points

Bowel cancer is often curable cure is more likely if the cancer is treated at an early stage it is important that people should report unusual bowel symptoms quickly cancer is often preceded by a polyp removal of polyps is important to prevent cancer chemotherapy in addition to surgery for cancer is useful for some patients close relatives of younger patients with bowel cancer should be screened

For more endoscopic details please download the video clip by clicking on the image
Colonoscopic image.
Metachcronous Carcinoma.

Carcinoma of the Transverse colon, proximal to the splecnic angle, 69 year old male who undergone colon surgery thirteen years ago for adenocarcinoma of the cecum. (Right Hemicolectomy) he have not following any control after his surgery, he had anemia and arrived to our clinic for the first time prepared for Colonoscopy by his daughter who is a nurse.(The same daughter towards three years had surgery for colon cancer).
The incidence of Metachcronous Carcinoma is in 2% to 4%, periodic examination of the large bowel with Colonoscopy every 1 to 3 years provides the most accurate results. For more endoscopic details please download the video clip by clicking on the image
Colonoscopic Image.
31 year old male with Carcinoma of the cecum that towards two and half years I performed polipectomy of adenoma velloso of great size in the rectal area between the first and second valve. At that time I recomended a control with a full colonoscopy to screnning the complete colon, but in spite of have explained him the importance of the colonoscopy the patient did not attend his appointment HOWEVER two years and a half, he made an appointment and we found the carcinoma displayed in the image and the video clip.

For more endoscopic details please download the video clip by clicking on the image
Rectal Carcinoma, the forceps biopsy is observed with a small fragment of the tumor.
For more endoscopic details please download the video clip by clicking on the image
Cecum Cacinoma, the ileocecal valve is observed.

For more endoscopic details please download the video clip by clicking on the image

Same tumor as above, the ileocecal valve is observed, with
some activity of secretion.

For more endoscopic details please download the video clip by clicking on the image
Cancer of the rectum of 33 year old male that was using application of a hemorroidal cream for hemorrhoids (auto prescription)

For more endoscopic details please download the video clip by clicking on the image

Ulcerated Rectal Carcinoma, With the morphologic structure impress that
becomes from a polyp which degenerated into a cancer.
See how the cancer comes

For more endoscopic details please download the video clip by clicking on the image

Rectal Carcinoma.
Please click on the image to download the video clip.
73 year old female, rectal bleeding and weight loss
she had for long time autoprecription treatment for supposed hemorrhoids
we found Rectal adenocarcinoma of the first rectal valve.

For more endoscopic details please download the video clip.
81 year old male who came to our clinics
who is accompanied by his daughter who is Medical Doctor Pediatrician
he had diarrea for three months we found Rectal adenocarcinoma of the second rectal valve that infiltrate the third valve and one rectal malign node after the pectine line.

For more endoscopic details of this case download the image by clicking on the image.

67 Year old male, weight loss and anemia Hb. 7.2 he has been taken five negative guayaco stool test for ocult bleedind weight loss more than 20 pounds. Adenocarcinoma of the ascending colon.

For more endoscopic details of this case download the image by clicking on the image.
Same image as above case, anemia screning digestive diseases must be exclueded, Colon Cancer produces severe anemia, (right colon).

For more endoscopic details please download the video clip by clicking on the image

Cecum Carcinoma. 56 year old female with long standing pain in the right iliac fossa who had received prolonged medical treatment for a supposed irritable bowel syndrome during more than a year. She came to our clinic and the next day we performed a full colonoscopy. For more endoscopic details please download the video clip by clicking on the image.

Presionar la Imagen Para Apreciar  el  video

Female of 62 year old, Rectum Adenocarcinoma

For more endoscopic details please download the video clip by clicking on the image
76 year old female, enterorragia , Rectum Adenocarcinoma

For more endoscopic details please download the video

95 year old female having a carcinoma of the ascending colon near to the cecum. Patient had severe anemia.

For more endoscopic details of this case download the image by clicking on the image.

Same Case of above.

For more endoscopic details of this case download the image by clicking on the image.

Same case as above.

Click on the image to download the video clip.

77 year old woman with rectal carcinoma. For more endoscopic details please download the video clip clicking on the image. To appreciate the video in full screen: 1. Wait to download the video "complete". 2. Click on the windows media. 3. Press Alt and Enter.

For more endoscopic details of this case download the image by clicking on the image.

52 years old male with rectal bleeding and weight loss more than 20 pounds. Rectal Adenocarcinoma.

For more endoscopic details of this case download the image by clicking on the image.


51 year old woman, with carcinoma at the sigmoid at the recto-sigmoid junction. The carcinoma infiltrated the urinary bladder. For more details please download the video clip clicking on the image .

Via: Notes on Cyber Gastroentrology
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