Note: Separate PDQ summaries on Screening for Colorectal Cancer,Prevention of Colorectal Cancer,and Genetics of Colorectal Cancer are also available. Information about colon cancer in children is available in the PDQ summary on Unusual Cancers of Childhood Tr

Histologic types of rectal cancer include: Adenocarcinoma (most rectal cases). Mucinous (colloid) adenocarcinoma. Signet ring adenocarcinoma. Scirrhous tumors.

Treatment decisions should be made with reference to the TNM classification,[ 1 ] rather than the older Dukes¡¯ or the Modified Astler-Coller (MAC) classification schema.

Note: Some citations in the text of this section are followed by a level of evidence. The PDQ editorial boards use a formal ranking system to help the reader judge the strength of evidence linked to the reported results of a therapeutic strategy.

Stage 0 rectal cancer is the most superficial of all the lesions and is limited to the mucosa without invasion of the lamina propria. Because of its superficial nature,surgical and other procedures may be limited. STANDARD TREATMENT OPTIONS: Local excision o

STAGE I (OLD STAGE: DUKES¡¯ A OR MODIFIED ASTLER-COLLER A AND B1) Because of its localized nature,stage I has a high cure rate.

Note: Some citations in the text of this section are followed by a level of evidence. The PDQ editorial boards use a formal ranking system to help the reader judge the strength of evidence linked to the reported results of a therapeutic strategy.

Note: Some citations in the text of this section are followed by a level of evidence. The PDQ editorial boards use a formal ranking system to help the reader judge the strength of evidence linked to the reported results of a therapeutic strategy. (Refer to t

Note: Some citations in the text of this section are followed by a level of evidence. The PDQ editorial boards use a formal ranking system to help the reader judge the strength of evidence linked to the reported results of a therapeutic strategy.

Note: Some citations in the text of this section are followed by a level of evidence. The PDQ editorial boards use a formal ranking system to help the reader judge the strength of evidence linked to the reported results of a therapeutic strategy.

The PDQ cancer information summaries are reviewed regularly and updated as new information becomes available. This section describes the latest changes made to this summary as of the date above.

ABOUT PDQ PDQ? - NCIs Comprehensive Cancer Database. Full description of the NCI PDQ database. ADDITIONAL PDQ SUMMARIES PDQ? Cancer Information Summaries: Adult Treatment Treatment options for adult cancers.

Rectal cancer is a disease in which malignant (cancer) cells form in the tissues of the rectum.

After rectal cancer has been diagnosed, tests are done to find out if cancer cells have spread within the rectum or to other parts of the body. The process used to find out whether cancer has spread within the rectum or to other parts of the body is called sta

Recurrent rectal cancer is cancer that has recurred (come back) after it has been treated.

There are different types of treatment for patients with rectal cancer. Different types of treatment are available for patients with rectal cancer. Some treatments are standard (the currently used treatment),and some are being tested in clinical trials.

Stage 0 Rectal Cancer Treatment of stage 0 (carcinoma in situ) rectal cancer may include the following: Local excision (surgery to remove the tumor without cutting into the abdomen) or simple polypectomy

Treatment of recurrent rectal cancer may include the following: Surgery to remove the tumor or as palliative therapy. Surgery to remove parts of other organs where the cancer may have spread.

Sources of further information about Rectal Cancer Treatment.

PDQ IS A COMPREHENSIVE CANCER DATABASE AVAILABLE ON NCIS WEB SITE. PDQ is the National Cancer Institutes (NCIs) comprehensive cancer information database. Most of the information contained in PDQ is available online at NCIs Web site.