|Variant(s)||PTEN any deletion|
PTEN mutations occur in 5–14% of colorectal cancers. PTEN is a tumor suppressor gene, and loss of PTEN results in upregulation of the PI3K/ AKT pathway. PTEN loss of expression is observed with KRAS, BRAF, and PIK3CA mutations. In retrospective studies, PTEN loss is associated with decreased sensitivity of colorectal cancer tumors to anti-EGFR antibodies. PTEN loss is associated with lack of benefit of the anti-EGFR antibody, cetuximab.
DeRoock et al… 2011. KRAS, BRAF, PIK3CA, and PTEN mutations: implications for targeted therapies in metastatic colorectal cancer. Lancet Oncol. 2011 Jun;12(6):594-603.
Laurent-Puig et al…2009. Analysis of PTEN, BRAF, and EGFR status in determining benefit from cetuximab therapy in wild-type KRAS metastatic colon cancer. J Clin Oncol. 2009 Dec 10;27(35):5924-30
Disclaimer: You assume full responsibility for all risks associated with using this PMKB website. The IPM makes no guarantee of the comprehensiveness, reliability or accuracy of the information on this website and the IPM assumes no responsibility for errors in the information associated with this web site. Healthcare providers and patients must integrate all clinical and laboratory findings as well as information from a variety of sources before deciding on appropriate clinical care options.