Annotation Detail

Information
Associated Genes
PIK3CA
Associated Variants
PIK3CA MUTATION
PIK3CA MUTATION
Associated Disease
breast cancer
Source Database
CIViC Evidence
Description
In retrospective study of 175 metastatic breast cancer patients treated with trastuzumab-based therapy, the presence of a PIK3CA mutation (E542K, E545K, or H1047R) was associated with a greater risk of progression (HR = 1.86, P = 0.014, multivariate analysis ) compared to wildtype PIK3CA.
Variant Origin
somatic
Variant Origin
Somatic
Evidence URL
https://civic.genome.wustl.edu/links/evidence_items/2087
Gene URL
https://civic.genome.wustl.edu/links/genes/37
Variant URL
https://civic.genome.wustl.edu/links/variants/311
Rating
3
Evidence Type
Predictive
Disease
Breast Cancer
Evidence Direction
Supports
Drug
Trastuzumab
Evidence Level
B
Clinical Significance
Resistance
Pubmed
21594665
Drugs
Drug NameSensitivitySupported
TrastuzumabResitance or Non-Reponsetrue