Is EGFR p.Arg23= (c.67C>A) pathogenic?

EGFR p.Arg23= (c.67C>A) is classified Likely benign in EGFR (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-07-12). Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with EGFR p.Arg23= (c.67C>A)?

EGFR p.Arg23= (c.67C>A) is associated with hereditary neoplastic syndrome (ClinVar).

How common is EGFR p.Arg23= (c.67C>A) in the general population?

EGFR p.Arg23= (c.67C>A) is absent from gnomAD v4.1 (gnomAD).

EGFR p.Arg23=

c.67C>A · rs987102148 · VCV2804733

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,515,354)

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.049	GERP -2.5
Overall
CADD	10.22	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,515,354). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: EGFR
Protein: p.Arg23=
Coding: c.67C>A
MANE Select: NM_005228
dbSNP: rs987102148
Type: single nucleotide variant
Location: chr7:55019344 (GRCh38)
Gene constraint: LOEUF 0.475 · pLI 0.98 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 76.29 · 393 PDB

Full EGFR gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

EGFR p.Arg23Pro Uncertain significance ★★ ⚠ same residue
EGFR p.Arg23Trp Conflicting classifications of pathogenicity ★ ⚠ same residue
EGFR p.Arg23Gly Likely benign ★ same residue
EGFR p.Arg23Gln Uncertain significance ★ ⚠ same residue
EGFR c.1207+5G>A Uncertain significance ★★ same condition
EGFR c.1298+3A>G Uncertain significance ★★ same condition
EGFR c.1298+4A>G Uncertain significance ★★ same condition
EGFR c.1298+6T>C Uncertain significance ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/egfr-p-arg23 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown