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| Profile Name | PIK3CA exon21 |
| Gene Variant Detail | |
| Relevant Treatment Approaches |
| Molecular Profile | Indication/Tumor Type | Response Type | Relevant Treatment Approaches | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|---|
| PIK3CA exon21 | Her2-receptor negative breast cancer | no benefit | Everolimus | Phase III | Actionable | In a retrospective analysis of a Phase III trial (BOLERO-2), Afinitor (everolimus) demonstrated greater benefit on progression-free survival in patients with hormone receptor-positive, Erbb2 (Her2)-negative breast cancer harboring PIK3CA exon 10 (reported as exon 9) mutations (HR=0.26) compared to patients harboring PIK3CA exon 21 (reported as exon 20) mutations (HR=0.56) (PMID: 26503204; NCT00863655). | 26503204 | |
| PIK3CA exon21 | colon cancer | sensitive | Aspirin | Guideline | Actionable | Aspirin is included in guidelines as adjuvant therapy (category 2A) for patients with advanced colon cancer harboring PIK3CA exon 21 (reported as exon 20) mutations, including hotspot mutations occurring at Y1021, M1043, N1044, and H1047, and other somatic mutations affecting the PI3K pathway genes PIK3CA, PIK3R1, or PTEN (NCCN.org). | detail... | |
| PIK3CA exon21 | rectum cancer | sensitive | Aspirin | Guideline | Actionable | Aspirin is included in guidelines as adjuvant therapy (category 2A) for patients with advanced rectal cancer harboring PIK3CA exon 21 (reported as exon 20) mutations, including hotspot mutations occurring at Y1021, M1043, N1044, and H1047, and other somatic mutations affecting the PI3K pathway genes PIK3CA, PIK3R1, or PTEN (NCCN.org). | detail... |