“Colon cancer staging”的意思、由来-开放百科全书

Colon cancer staging is an estimate of the amount of penetration of a particular cancer. It is performed for diagnostic and research purposes, and to determine the best method of treatment. The systems for staging colorectal cancers depend on the extent of local invasion, the degree of lymph node involvement and whether there is distant metastasis.

Definitive staging can only be done after surgery has been performed and pathology reports reviewed. An exception to this principle would be after a colonoscopic polypectomy of a malignant pedunculated polyp with minimal invasion. Preoperative staging of rectal cancers may be done with endoscopic ultrasound. Adjunct staging of metastasis include Abdominal Ultrasound, MRI, CT, PET Scanning, and other imaging studies.

TNM staging system

The most common staging system is the TNM (for tumors/nodes/metastases) system, from the American Joint Committee on Cancer (AJCC). The TNM system assigns a number based on three categories. "T" denotes the degree of invasion of the intestinal wall, "N" the degree of lymphatic node involvement, and "M" the degree of metastasis. The broader stage of a cancer is usually quoted as a number I, II, III, IV derived from the TNM value grouped by prognosis; a higher number indicates a more advanced cancer and likely a worse outcome. Details of this system are in the graph below:

Dukes classification

In 1932 the British pathologist Cuthbert Dukes (1890-1977) devised a classification system for colorectal cancer.^[3] Several different forms of the Dukes classification were developed.^[4]^[5] However, this system has largely been replaced by the more detailed TNM staging system and is no longer recommended for use in clinical practice.^[6]

Astler-Coller classification

An adaptation by the Americans Astler and Coller in 1954 further divided stages B and C^[8]

The stage gives valuable information for the prognosis and management of the particular cancer. {{citation needed|date=October 2013}}

Full Dukes classification

Another modification of the original Dukes classification was made in 1935 by Gabriel, Dukes and Bussey.^[9] This subdivided stage C. This staging system was noted to be prognostically relevant to rectal and colonic adenocarcinoma.^[10] Stage D was added by Turnbull to denote the presence of liver and other distant metastases^[11]

References

1. ^{{cite book | title = AJCC Cancer Staging Manual | edition = Sixth | year = 2002 | publisher = Springer-Verlag New York, Inc.}}
2. ^http://cancerstaging.org/references-tools/quickreferences/documents/colonmedium.pdf
3. ^Who Named It, showing correct grammatical usage
4. ^Kyriakos M: The President cancer, the Dukes classification, and confusion, Arch Pathol Lab Med 109:1063, 1985
5. ^Dukes CE. The classification of cancer of the rectum. Journal of Pathological Bacteriology 1932;35:323
6. ^AJCC (American Joint Committee on Cancer) Cancer Staging Manual, 7th ed, Edge, SB, Byrd, DR, Compton, CC, et al (Eds), Springer, New York 2010. p 143.
7. ^Single Best Answers in Surgery, Patten DK et al. Hodder Education 2009. p.107 ({{ISBN|9780340972359}})
8. ^Astler VB, Coller FA: The prognostic significance of direct extension of carcinoma of the colon and rectum. Ann Surg 139:846, 1954
9. ^Gabriel WB, Dukes C, Busset HJR: Lymphatic spread in cancer of the rectum. Br J Surg 23:395-413, 1935
10. ^Grinnell RS: The grading and prognosis of carcinoma of the colon and rectum. Ann Surg 109:500-33, 1939
11. ^Turnbull RB Jr, Kyle K, Watson FR, et al: Cancer of the colon: the influence of the no touch isolation technique on survival rates. Ann Surg 166:420-7, 1967