Su1729 EARLY-ONSET COLORECTAL CANCER HAS UNIQUE CLINICAL CHARACTERISTICS AND MOLECULAR FEATURES

2019 ◽  
Vol 89 (6) ◽  
pp. AB398
Author(s):  
Rawan Dayah ◽  
Mohammad Bilal ◽  
Nattapron Tun ◽  
Tewfeek K. Abu-Shami ◽  
Adam L. Booth ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Early Onset ◽  
Clinical Characteristics ◽  
Molecular Features ◽  
Early Onset Colorectal Cancer

scholarly journals Molecular Features and Methylation Status in Early Onset (≤40 Years) Colorectal Cancer: A Population Based, Case-Control Study

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Giulia Magnani ◽  
Daniela Furlan ◽  
Nora Sahnane ◽  
Luca Reggiani Bonetti ◽  
Federica Domati ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Mismatch Repair ◽  
Early Onset ◽  
Methylation Status ◽  
The Elderly ◽  
Population Based ◽  
Repair System ◽  
Molecular Features ◽  
A Minor ◽  
Early Onset Colorectal Cancer

Colorectal cancer is usually considered a disease of the elderly. However, a small fraction of patients develops colorectal cancer earlier. The aim of our study was to define the frequency of known hereditary colorectal syndromes and to characterise genetic and epigenetic features of early nonhereditary tumors. Thirty-three patients ≤40 years with diagnosis of colorectal cancer and 41 patients with disease at >60 years of age were investigated for MSI, Mismatch Repair proteins expression,KRASandBRAFmutations, hypermethylation, and LINE-1 hypomethylation. Detection of germline mutations was performed in Mismatch Repair,APCandMUTYHgenes. Early onset colorectal cancer showed a high incidence of hereditary forms (18%).KRASmutations were detected in 36% of early nonhereditary tumors. Early onset colorectal cancer disclosed an average number of methylated genes significantly lower when compared to the controls (p=0.02). Finally both of the two groups were highly methylated inESR1,GATA5, andWT1genes and were similar for LINE-1 hypomethylation. The genetic make-up of carcinomas differs from young to elderly patients. Early onset tumors showed more frequently a constitutional defective of Mismatch Repair System and a minor number of methylated genes. Hypermethylation ofESR1,GATA5, andWT1genes suggests possible markers in the earlier diagnosis of colorectal tumorigenesis.

Risk factors and clinical characteristics of early-onset colorectal cancer vs. late-onset colorectal cancer

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Milena Di Leo ◽  
Raffaella A. Zuppardo ◽  
Marta Puzzono ◽  
Ilaria Ditonno ◽  
Alessandro Mannucci ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Risk Factors ◽  
Early Onset ◽  
Clinical Characteristics ◽  
Late Onset ◽  
Early Onset Colorectal Cancer

495P Clinical characteristics, prognostic factors and survival of early-onset colorectal cancer (EOCRC) in a Spanish cohort

2021 ◽  
Vol 32 ◽  
pp. S575-S576
Author(s):  
J. Soto Alsar ◽  
N. Gutiérrez Alonso ◽  
M. Bringas Beranek ◽  
C. López Jiménez ◽  
A. Gutiérrez Ortiz de la Tabla ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Prognostic Factors ◽  
Early Onset ◽  
Clinical Characteristics ◽  
Early Onset Colorectal Cancer ◽  
Spanish Cohort

scholarly journals Association of Polyps with Early-Onset Colorectal Cancer and Throughout Surveillance: Novel Clinical and Molecular Implications

Cancers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 1900
Author(s):  
José Perea García ◽  
Julia Arribas ◽  
Ángel Cañete ◽  
Juan Luis García ◽  
Edurne Álvaro ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Early Onset ◽  
Comparative Genomic ◽  
Molecular Features ◽  
Mucinous Component ◽  
History Of ◽  
Advanced Stages ◽  
The Right ◽  
Early Onset Colorectal Cancer

Early-onset colorectal cancer (EOCRC) is an increasing and worrisome entity. The aim of this study was to analyze its association with polyps concerning prognosis and surveillance. EOCRC cases were compared regarding the presence or absence of associated polyps (clinical and molecular features), during a minimum of 7 years of follow-up. Of 119 cases, 56 (47%) did not develop polyps (NP group), while 63 (53%) did (P group). The NP group showed a predominant location of the CRC in the rectum (50%), of sporadic cases (54%), and diagnosis at advanced stages: Only P53 and SMARCB1 mutations were statistically linked to this group. The P group, including mainly early-diagnosed tumors, was linked with the most frequent and differential altered chromosomal regions in the array comparative genomic hybridization. The two most frequent groups according to the follow-up were the NP group (40%), and patients developing polyps in the first 5 years of follow-up (P < 5FU) (34%) (these last groups predominantly diagnosed at the earliest stage and with adenomatous polyps (45%)). EOCRC with polyps that developed during the entire follow-up (PDFU group) were mainly located in the right colon (53%), diagnosed in earlier stages, and 75% had a familial history of CRC. Patients developing polyps after the first 5 years (P > 5FU) showed a mucinous component (50%). Our results show that the absence or presence of polyps in EOCRC is an important prognostic factor with differential phenotypes. The development of polyps during surveillance shows that it is necessary to extend the follow-up time, also in those cases with microsatellite-stable EOCRC.

scholarly journals Clinicopathological and Molecular Characteristics of Early-Onset vs Late-onset Colorectal Cancer according to Tumor Location

2021 ◽  
Author(s):  
Yongle Chen ◽  
Zexian Chen ◽  
Juanni Huang ◽  
Jiancong Hu ◽  
Xiaowen He ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Early Onset ◽  
Odds Ratio ◽  
Late Onset ◽  
Tumor Location ◽  
Molecular Characteristics ◽  
Molecular Features ◽  
Significant Difference ◽  
The Right ◽  
Early Onset Colorectal Cancer

Abstract BackgroundThe incidence of early-onset colorectal cancer (EOCRC) is rapidly increasing worldwide in decade when screening of colorectal cancer (CRC) is more prevalent. The clinicopathological and molecular characteristics of EOCRC have not yet been clarified. This study aims to evaluate clinicopathological and molecular features including status of deficiencies of mismatch repair (dMMR), mutation of PIK3CA, BRAF and KRAS among EOCRC and late-onset colorectal cancer (LOCRC) patients according to different tumor locations.MethodsWe identified CRC patients from a prospectively maintained CRC database between January 2015 and December 2018 at the Sixth Affiliated Hospital of Sun Yat-sen University. The clinicopathological and molecular characteristics including dMMR, mutation of PIK3CA, BRAF and KRAS were compared between EOCRC and LOCRC. The relationships according to different tumor locations were assessed.ResultsTotally 4468 patients, including 947 EOCRC patients and 3521 LOCRC patients, were analyzed in this study. Compared with LOCRC patients, EOCRC patients were more likely to have status of dMMR (odds ratio [OR], 2.52; 95% confidence interval [CI], 2.05-3.10; P<0.001), regardless of tumor location, so were loss of MSH2 and MSH6 (OR, 4.31; 95% CI, 2.86-6.48; P<0.001; OR, 3.40; 95% CI, 2.42-4.76; P<0.001, respectively). Loss of MLH1 and PMS2 were detected more frequently in EOCRC overall (OR, 2.11; 95% CI, 1.55-2.87; P<0.001; OR, 1.83; 95% CI, 1.42-2.35; P<0.001, respectively), but only in left-side and right-side colon rather than in rectum. EOCRC patients were more likely to be detected with mutation of PIK3CA (OR, 1.24; 95% CI, 1.01-1.53; P=0.041), which only trended to exist in the left-side colon (OR, 1.51; CI, 0.98-2.33; P=0.06), but not in the right-side colon or rectum. No significant difference was found for BRAF or KRAS mutation, but mutation of KRAS was more frequently found in left-side colon (OR, 1.34; CI, 1.02-1.77; P=0.04) among EOCRC patients.ConclusionsStatus of dMMR, mutation of PIK3CA, BRAF and KRAS were different between EOCRC and LOCRC patients according to different tumor locations, which implied that EOCRC might be a unique subgroup of CRC patients. Further investigations of molecular and genetic differences should be performed to help define new diagnosing and therapeutical strategies for EOCRC patients.

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