Is EGFR p.Arg108= (c.322A>C) pathogenic?

EGFR p.Arg108= (c.322A>C) is classified Likely benign in EGFR (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-11-30). Absent from gnomAD v4.1; Associated with hereditary neoplastic syndrome.

What condition is associated with EGFR p.Arg108= (c.322A>C)?

EGFR p.Arg108= (c.322A>C) is associated with hereditary neoplastic syndrome (ClinVar).

How common is EGFR p.Arg108= (c.322A>C) in the general population?

EGFR p.Arg108= (c.322A>C) is absent from gnomAD v4.1 (gnomAD).

EGFR p.Arg108=

c.322A>C · VCV4639333

Likely benign Multiple submitters

Classification

Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Absent

absent from gnomAD v4.1

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 -0.27	GERP -4.7, phastCons 0.008
Overall
CADD	6.681	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: EGFR
Protein: p.Arg108=
Coding: c.322A>C
MANE Select: NM_005228
Type: single nucleotide variant
Location: chr7:55143386 (GRCh38)
Gene constraint: LOEUF 0.475 · pLI 0.98 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 76.29 · 393 PDB
Residue 108: a UniProt-annotated variant site (variant egfr viii; found in a lung cancer sample; somatic mutation; induces lung cancer when exogenously expressed)

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.Arg108Ser 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
EGFR c.1499-3C>T Uncertain significance ★★ same condition
EGFR c.1499-4G>T Uncertain significance ★★ same condition
EGFR c.1920-3C>T 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-arg108 (accessed [today's date]).

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