Molecular Profile Detail

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Profile Name KIT W557_E561del
Gene Variant Detail

KIT W557_E561del (gain of function - predicted)

Relevant Treatment Approaches KIT Inhibitor

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Molecular Profile Indication/Tumor Type Response Type Relevant Treatment Approaches Therapy Name Approval Status Evidence Type Efficacy Evidence References
KIT W557_E561del gastrointestinal stromal tumor sensitive KIT Inhibitor Sunitinib Preclinical - Pdx Actionable In a preclinical study, Sutent (sunitinib) inhibited tumor growth in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT W557_E561del with overexpression of GPR20 (IHC score 3+) (PMID: 33579785). 33579785
KIT W557_E561del gastrointestinal stromal tumor sensitive KIT Inhibitor Imatinib Preclinical - Pdx Actionable In a preclinical study, Gleevec (imatinib) inhibited tumor growth in a patient-derived xenograft (PDX) model of gastrointestinal stromal tumor harboring KIT W557_E561del with overexpression of GPR20 (IHC score 3+) (PMID: 33579785). 33579785
KIT W557_E561del gastrointestinal stromal tumor sensitive KIT Inhibitor Imatinib Case Reports/Case Series Actionable In a clinical case study, Gleevec (imatinib) treatment led to partial responses in two patients with gastrointestinal stromal tumors harboring KIT W557_E561del, with a progression-free survival (PFS) of 10.7 mo and overall survival (OS) of 14.9 mo in one patient, and a PFS of 32.2 mo and OS of 34.4 mo in the second patient (PMID: 18294292). 18294292