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Test Code FGFRC Fibroblast Growth Factor Receptor 1 (FGFR1) IHC, Technical Component Only

Advisory Information

This test includes only technical performance of the stain (no pathologist interpretation is performed). If diagnostic consultation by a pathologist is required order PATHC / Pathology Consultation.

Shipping Instructions

Attach the green pathology address label and the pink Immunostain Technical Only label included in the kit to the outside of the transport container.

Specimen Required

Supplies: Immunostain Technical Only Envelope (T693)

Specimen Type: Tissue

Container/Tube: Immunostain Technical Only Envelope (T693)

Preferred: 2 Unstained positively charged glass slide (25- x 75- x 1-mm) per test ordered; sections 4-microns thick

Acceptable: Formalin-fixed, paraffin-embedded (FFPE) tissue block

Secondary ID


Useful For

Classification of a subset of lung squamous cell carcinoma

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
IHTOI IHC Initial, Tech Only No No
IHTOA IHC Additional, Tech Only No No

Method Name


Reporting Name

FGFR1 IHC, Tech Only

Specimen Type


Specimen Stability Information

Specimen Type Temperature Time
TECHONLY Ambient (preferred)

Reject Due To








Wet/frozen tissue

Cytology smears

Nonformalin fixed tissue

Nonparaffin embedded tissue

Noncharged slides

ProbeOn slides

Clinical Information

FGFR1 is a receptor tyrosine kinase that belongs to the fibroblast growth factor family. FGFR1 amplification is seen in 13% to 22% of lung squamous cell carcinoma (SQCC) and has been associated with a worse prognosis. For instance, FGFR1 expression in head and neck SQCC correlates with poor histologic differentiation, wide invasion, and abundant nuclear pleomorphism. Anti-FGFR inhibitors are now in early clinical trials and have shown to inhibit growth and induce apoptosis in lung cancer cell lines.


This test includes only technical performance of the stain (no pathologist interpretation is performed). Mayo Clinic cannot provide an interpretation of tech only stains outside the context of a pathology consultation. If an interpretation is needed, refer to test code PATHC / Pathology Consultation for a full diagnostic evaluation or second opinion of the case. All material associated with the case is required. Additional specific stains may be requested as part of the pathology consultation, and will be performed as necessary at the discretion of the Mayo pathologist.


The positive and negative controls are verified as showing appropriate immunoreactivity and documentation is retained at Mayo Clinic Rochester. If a control tissue is not included on the slide, a scanned image of the relevant quality control tissue is available upon request. Contact 855-516-8404.


Interpretation of this test should be performed in the context of the patient's clinical history and other diagnostic tests by a qualified pathologist.

Clinical Reference

1. Nguyen PT, Tsunematsu T, Yanagisawa S, et al: The FGFR1 inhibitor PD173074 induces mesenchymal-epithelial transition through the transcription factor AP-1. BJC 2013;109:2248-2258

2. Kohler LH, Mireskandari M, Knasel T, et al: FGFR1 expression and gene copy numbers in human lung cancer. Virchows Arch 2012;461:49-57

3. Kim HR, Kim DJ, Kang DR, et al: Fibroblast Growth Factor Receptor 1 Gene Amplification is Associated with Poor Survival and Cigarette Smoking Dosage in Patients with Resected Squamous Cell Lung Cancer. Journal of Clinical Oncology 2013;31(6):731-737

Day(s) and Time(s) Performed

Monday through Friday

Analytic Time

1 day

Performing Laboratory

Mayo Medical Laboratories in Rochester

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

88342-TC, primary

88341-TC, if additional IHC

LOINC Code Information

Result ID Test Result Name Result LOINC Value
71490 FGFR1 IHC, Tech Only In Process