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Department of General, Visceral, and Transplantation Surgery, LMU Klinikum, Munich, Germany
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Article / Publication DetailsFirst-Page Preview
Received: April 25, 2022
Accepted: August 17, 2022
Published online: November 30, 2022
Number of Print Pages: 7
Number of Figures: 2
Number of Tables: 1
ISSN: 2297-4725 (Print)
eISSN: 2297-475X (Online)
For additional information: https://www.karger.com/VIS
AbstractBackground: Early colorectal cancer (eCRC) is defined as cancer that does not cross the submucosal layer of the colon or rectum, including carcinoma in situ (pTis), pT1a, and pT1b. Early carcinomas differ in their prognosis depending on the risk profile. The differentiation between low and high risk is essential. The low-risk group includes R0-resected, well (G1) or moderately (G2) differentiated tumors without lymphatic vessel invasion (L0), without blood vessel invasion (V0) and a tumor size ≤3 cm. In this constellation, the estimated risk of lymph node metastasis is around 1% or below. The high-risk group includes tumors with incomplete resection (Rx), poor (G3) or undifferentiated (G4) carcinomas, and/or lymphatic and blood vessel invasion (L1) and size ≥3 cm. In a “high-risk” situation, there is a risk for lymph node metastasis of up to 23%. Summary: The incidence of eCRC is rising with a rate of 10% in all endoscopically removed lesions during colonoscopy. For a correct histological evaluation, all suspected lesions should be completely resected. In case of a pT1 lesion in the rectum, pelvic magnetic resonance imaging should be performed to evaluate for suspicious lymph nodes. The therapeutic approach for eCRC is based on histological assessment and ranges from endoscopic resection to radical oncological surgery. The advantages, disadvantages, and associated risks of the individual treatment strategy need to be carefully discussed on a tumor board and with the patient. Key Messages: Treatment options for early colorectal cancer depend on the histological assessment. Poorly differentiated carcinomas, a Kudo ≥ SM2 classified lesion, and a Haggitt level 4 always represent a “high-risk” situation. It should also be mentioned that in rectal cancer, local surgical tumor excision (full-wall excision) is also sufficient for pT1 carcinomas with a “low-risk” constellation (G1/G2; L0, size <3 cm) and an R0 resection.
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Received: April 25, 2022
Accepted: August 17, 2022
Published online: November 30, 2022
Number of Print Pages: 7
Number of Figures: 2
Number of Tables: 1
ISSN: 2297-4725 (Print)
eISSN: 2297-475X (Online)
For additional information: https://www.karger.com/VIS
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