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Molecular Pathology of
Colorectal Cancer
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Region Incidence Overall Incidence Males Incidence Females Deaths Overall Deaths Males Deaths Females
USA 142570 72090 70480 51370 26580 24790

Affected Protein Pathway Sub-Type Ethnicity Stage Frequency (%) Gene Amplification Activating Mutation Inactivating Mutation Deletion Promoter Hypermethylation Comment  
AKT1 PI3-Kinase Signaling
6% mutation in PH domain (E17K) activating kinase activity
APC (adenomatosis polyposis coli) WNT Signaling
90%
BRAF Ras Signal Transduction Pathway
colorectal carcinoma 10 - 18% more frequently in tumours harbouring MLH1 promoter hypermethylation and with a CpG island methylation phenotype (CIMP)
EGF Receptor Receptor Tyrosine Kinase Signaling
72% Overexpression
EPHB6, EPH receptor B6 13%
KRAS Ras Signal Transduction Pathway
colorectal carcinoma 30%
LRP2 (low density lipoprotein-related protein 2 ) 10%
MLH1 DNA-Repair
early
MLL3 (myeloid/lymphoid or mixed-lineage leukemia Transcriptional regulation
21%
obscurin (OBSCN) 19%
p14ARF (CDKN2A) p53 Tumor Suppressor Pathway
primary colorectal carcinoma 28% occurs independently of the p16INK4a methylation status
p53 p53 Tumor Suppressor Pathway
colorectal carcinoma 40-61% higher frequency observed in distal colon and rectal tumors
Pi3-kinase PI3-Kinase Signaling
10 - 32% arise late in tumorigenesis
PKHD1,polycystic kidney and hepatic disease 1 16%
PTEN PI3-Kinase Signaling
20% reduced or absent PTEN expression correlates with later clinical stage
PTPRD (protein tyrosine phosphatase, receptor type 10%
PYCARD (ASC/TMS1) Apoptosis regulation
17% Methylation of ASC/TMS1 appears to be a late-stage event in colorectal carcinogenesis associated with invasive carcinomas but not with normal colorectal tissue or colorectal adenomas.
RASSF1A (Ras-association domain family 1) Cell Cycle Regulation
15%
RET, ret proto-oncogene Receptor Tyrosine Kinase Signaling
10%
SMAD2 10%
SMAD4 (DPC4) TGF-beta Signaling
13%
SMAD4 (DPC4) TGF-beta Signaling
carcinomas metastasized to the liver and distant lymph nodes 31%
SMAD4 (DPC4) TGF-beta Signaling
intramucosal carcinomas 10%
SMAD4 (DPC4) TGF-beta Signaling
invasive carcinomas without distant metastasi 7%
SMAD4 (DPC4) TGF-beta Signaling
primary invasive carcinomas with distant metastasis 35%
TBX22 (T-box 22) 12%
TCF7L2 (transcription factor 7-like 2) 10%

See Clinical Trials in in the TTC Database
CANCER.GOV PDQ® - Standard Treatments for Colorectal Cancer