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EGFR gene T790M, L858R and 19 del Mutation Detection Kit

Digital PCR 


Introduction of EGFR

Epidermal growth factor receptor (EGFR) is a receptor tyrosine kinase, expressed in 50% of non-small cell lung cancer (NSCLC) [1], which is closely related to the occurrence and development of tumors. The carcinogenic mutations of EGFR mostly occur in exons 18-21, of which 19 del and L858R account for 85% to 90% of all EGFR mutations [1], which are also the most common EGFR-TKI sensitive mutations. The T790M mutation suggests resistance to the first and second generation of EGFR-TKIs while sensitive to the third generation of EGFR-TKI. Both the National Comprehensive Cancer Network (NCCN) and the Chinese Society of Clinical Oncology (CSCO) guidelines have included EGFR mutation detection as a category 1 recommendation [2] [3]. The guidelines also clearly stated that "When tumor tissue cannot be obtained or can be obtained for small amounts ,EGFR mutation detection can be performed through peripheral blood /tumor DNA (cf/ctDNA) [3]".


[1] Nat Rev Cancer. 2007 Mar;7(3):169-81.

[2] NCCN Clinical Diagnosis and Treatment Guidelines NSCLC 2021 V76 

[3] CSCO NSCLC Diagnosis and Treatment Guidelines 2021


Introduction of ctDNA

ctDNA is released into blood vessels by tumor cells or circulating tumor cells through apoptosis, necrosis, phagocytosis, or active secretion. It can reflect the real-time tumor load in the body, dynamically monitor the efficacy of drugs, and predict disease changes early. ctDNA has become a dynamic biomarker based on plasma, which plays an important role in the fields of early tumor diagnosis, molecular typing, targeted drug selection, and monitoring of minimal residual disease. Since the content of ctDNA is usually less than 1% of the total cfDNA of an individual [4], screening ctDNA from a large amount of cfDNA requires high detection sensitivity. Liquid biopsy technology based on digital PCR makes its possible to detect low concentrations of ctDNA.ctDNA is released into the blood[5]





Detection Item

GeneMutationDrug Indication
EGFR19 del、L858R

Gefitinib, Erlotinib, Icotinib, Afatinib, Osimitinib,

Ametinib, Dacomitinib


T790MOsimitinib, Almonertinib, Furmonertinib



Performance Parameter


Product NameTechnology

Product Specification

Sample TypeMatched Instrument
Human EGFR Gene 

T790M Mutation 

Detection Kit(CE-IVD)

EGFR-T790MDigital PCR10 tests/kit

tumor tissue,ctDNA,

pleural effusion

Human EGFR Gene 

L858R Mutation 

Detection Kit(RUO)

Digital PCR

24 tests/kit,

48 tests/kit

tumor tissue,

 ctDNA,,

pleural effusion

Bio-Rad QX200

Human EGFR Gene 

19 del Mutation 

Detection Kit(RUO)


1.The detection of EGFR mutation for stage II/III non-squamous cell carcinoma after operation can help guide adjuvating targeted therapies.

2. It is recommended to detect EGFR gene status before first line treatment for patients with inoperable stage III and IV NSCLC to guide the treatments according to molecular classification. If tissue samples are not available, circulating tumor DNA can be considered for testing.

3.For patients with EGFR-TKI resistance, EGFR T790M gene mutation detection is recommended. If tissue samples are not available, circulating tumor DNA can be considered for testing.

4. Regularly monitor T790M resistance mutations after using EGFR-TKI drugs.



Product Highlights


High Sensitivity: This kit can detect as low as 0.1% mutation in DNA sample.

Precise Quantification:Quantitative detection of gene mutation abundance, timely detection of disease progression, and adjustment of treatment plans. 

No internal reference needed: Avoid fake negative.

Easy operation: Only 1 day for the detection process.3 working days from sample to report.


Detection Process