Prognostic Impact of Increased Lymph Node Yield in Colorectal Cancer Patients With Synchronous Distant Metastasis: a Population-based Study of the US Database and a Chinese Registry

The Second Affiliated Hospital of Harbin Medical University4,575 enrolled

Overview

The National Quality Forum has endorsed at least 12 lymph node yield (LNY) as a surgical quality indicator in colorectal cancer (CRC), but the prognostic value of adequate lymphadenectomy has rarely been investigated for CRC patients with distant metastatic disease.

Data on CRC patients with synchronous liver metastasis (LM) were derived from the US Surveillance, Epidemiology, and End Results (SEER) and a Chinese registry (from two Chinese tertiary centers: The Second Affiliated Hospital of Harbin Medical University and National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences \& Peking Union Medical College) between January 2010 and December 2017. Individual level data on patients with incident CRC were consecutively collected in both registries. The primary tumor site was divided into three subsites according to International Classification of Diseases for Oncology (ICD-O-3) topography codes: proximal colon (C18.0, C18.1, C18.2, C18.3 and C18.4), distal colon (C18.5, C18.6, C18.7) and rectum (C19.9 and C20.9). The synchronous LM were identified by imaging or histopathological examinations. Synchronous LM refers to liver lesions found within 6 months after the diagnosis of primary CRC. Patients were excluded if they did not undergo surgery for CRC, did not have data on number of LNs retrieved and their survival status was unknown.

Study Type

OBSERVATIONAL

Enrollment

4,575

Conditions

Colorectal Cancer Stage IV Lymph Node Yield

Interventions

lymph node yieldOTHER

We recorded the number of lymph nodes dissected during surgery in patients with colorectal cancer

Eligibility

Sex: ALLMin age: 18 YearsMax age: 90 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Data on CRC patients with synchronous liver metastasis (LM) undergo surgery for CRC, have data on number of LNs retrieved and their survival status was known Exclusion Criteria: * Patients were excluded if they did not undergo surgery for CRC, did not have data on number of LNs retrieved and their survival status was unknown

Locations (1)

Ethics and ethics of the Second Affiliated Hospital of Harbin Medical University

Harbin, Heilongjiang, China

Outcomes

Primary Outcomes

cancer specific survival

The primary outcome was cancer specific survival (CSS), which was defined as the time interval from the synchronous LM diagnosis until cancer specific death or the end of follow-up in Chinese registry, and the CSS was defined using the SEER cause-of-death codes in SEER registry

Time frame: 2010.01-2017.12

Data from ClinicalTrials.gov

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