Lab Tests

EGFR Mutation Study (10 Common Mutations)

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EGFR Mutation Study (10 Common Mutations), in Visit Clinic

Detects ten common EGFR gene mutations to guide targeted treatment choices and prognosis for lung cancer in Visit Clinic.

Centre Visit

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SAMPLE TYPE

Tissue

FASTING REQUIRED

GENDER

Male/Female

GET REPORTS IN

26 hours

TEST INCLUDED

20K+Customers

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What is a EGFR Mutation Study (10 Common Mutations) Test in Visit Clinic?

This test looks for ten common changes (mutations) in the EGFR gene. EGFR helps control how cells grow and divide. Certain mutations can make cells grow uncontrollably and drive cancers, especially non-small cell lung cancer. Finding these mutations is important because specific medicines can target them. Doctors use results to choose targeted treatments, predict likely response, and watch for resistance during therapy. Results can affect treatment plans and help avoid ineffective medicines. Sometimes the test is done on a tissue biopsy from a tumor. Results are combined with other clinical information before making treatment decisions.

EGFR Mutation Study (10 Common Mutations) Test Preparation in Visit Clinic

No special preparation is required.

EGFR Mutation Study (10 Common Mutations) Test Parameters in Visit Clinic

The EGFR Mutation Study (10 Common Mutations) test evaluates various parameters. Here are the main parameters checked:

Exon 19 deletions; L858R (Exon 21); T790M (Exon 20); G719A/C/S (Exon 18); S768I; L861Q; Exon 20 insertions; E709X; other Exon 18/21 point mutations; common activating/resistance EGFR variants

Why Take a EGFR Mutation Study (10 Common Mutations) Test in Visit Clinic?

EGFR Mutation Study (10 Common Mutations) is part of molecular panels used for suspected or confirmed non-small cell lung cancer. Doctors may order it when imaging or symptoms suggest lung cancer or when a biopsy is available. It helps diagnose and guide targeted therapy, monitor treatment response, and detect resistance. Abnormal results usually reflect acquired or inherited changes in the tumor’s DNA rather than lifestyle. A strong family history of cancer or unusual clinical features may prompt testing.

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Frequently asked questions

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What are the common mutations in EGFR in Visit Clinic?

Common EGFR mutations include exon 19 deletions and the exon 21 L858R point mutation (both sensitizing to EGFR inhibitors). Other frequent alterations are exon 20 insertions and the T790M resistance mutation (exon 20). Less common activating variants include G719X (exon 18), S768I (exon 20), and L861Q (exon 21). These mutations guide targeted therapy choices.

What is the most common EGFR resistance mutation in Visit Clinic?

The most common EGFR resistance mutation is T790M — a threonine-to-methionine substitution at amino acid 790. It arises in roughly 50–60% of patients with acquired resistance to first- and second‑generation EGFR tyrosine kinase inhibitors, increases ATP affinity at the kinase “gatekeeper” residue, and reduces drug binding. Detection guides use of third‑generation inhibitors effective against T790M.

What is the EGFR mutation test in Visit Clinic?

The EGFR mutation test detects changes in the EGFR gene in cancer cells, usually from a tumor biopsy or a blood (liquid biopsy) sample. It identifies mutations (for example exon 19 deletions, L858R, T790M) that predict response or resistance to EGFR-targeted therapies, helping oncologists choose appropriate tyrosine kinase inhibitors and guide prognosis and treatment planning.

What are EGFR exon 20 insertion mutations in Visit Clinic?

EGFR exon 20 insertion mutations are in-frame insertions within exon 20 of the epidermal growth factor receptor gene that alter the kinase domain’s shape, producing constitutive receptor activation. They occur in a subset of non-small cell lung cancers and are generally less sensitive to first- and second-generation EGFR tyrosine kinase inhibitors, often requiring newer targeted agents developed specifically for this mutation class.

What are classical EGFR mutations in Visit Clinic?

Classical EGFR mutations are the common activating alterations in non–small cell lung cancer, chiefly exon 19 deletions and the exon 21 L858R point mutation. These alterations increase EGFR kinase activity and typically confer sensitivity to EGFR tyrosine kinase inhibitors. They are most frequent in adenocarcinomas, especially among non‑smokers, females, and East Asian patients; other uncommon variants can affect treatment response.

What is HER2 mutation in Visit Clinic?

HER2 mutation refers to changes in the ERBB2 gene that lead to overproduction or abnormal activity of the HER2 receptor, a cell-surface tyrosine kinase. This drives rapid cell growth and is implicated especially in certain breast and gastric cancers. HER2 alterations affect prognosis and guide use of targeted therapies (for example, trastuzumab, pertuzumab, tyrosine kinase inhibitors) to block HER2-driven signaling.

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