Classification rationale
1
The PTEN c.890_899del (p.(Asp297AlafsTer7), p.(D297Afs*7)) variant has not been observed in somatic cancers in COSMIC and has not been reported in ClinVar.
clinvar ↗2
This variant is absent from gnomAD v2.1 and gnomAD v4.1, which is below the PTEN Expert Panel PM2_Supporting threshold of 0.00001 (0.001%).
cspec ↗ gnomad_v2 ↗ gnomad_v4 ↗3
This deletion causes a frameshift with premature termination, and under the PTEN-specific PVS1 decision tree a stop/disruption at or 5' to p.D375 (c.1121) in NM_000314.8 supports PVS1.
cspec ↗4
SpliceAI predicts no significant splice impact for this variant, with a maximum delta score of 0.02; however, computational missense or splice criteria are not the primary basis for interpreting this truncating deletion.
spliceai ↗ cspec ↗