GIST

INTRIGUE study results show that patients with gastrointestinal stromal tumor who harbor certain KIT mutations have significantly improved responses and survival with ripretinib treatment.

Targeted therapy with tyrosine kinase inhibitors is necessary after surgery for patients with metastatic gastrointestinal stromal tumors with residual disease requiring resection to prevent disease recurrence.

There remains a need for biomarkers of primary gastrointestinal stromal tumor subclones to characterize invasion or metastasis, according to Jonathan A. Fletcher, MD.

In the Chinese population of the global INVICTUS trial, ripretinib was found to have a manageable safety profile and produced a good response rate.

Full results from the phase 3 INVICTUS trial show stable progression-free survival advantage and improved overall survival with ripretinib in patients with an advanced gastrointestinal stromal tumor.

Compared with sunitinib, second-line treatment with ripretinib did not improve progression-free survival in patients with gastrointestinal stromal tumor.

Pimitespib, a heat shock protein 90 inhibitor doubled the progression-free survival and prolonged the overall survival compared with placebo in patients with advanced gastrointestinal stromal tumor that is refractory to imatinib, sunitinib, and regorafenib, according to results from the phase 3 CHAPTER-GIST-301 trial.

Patients with advanced gastrointestinal stromal tumor after receiving fourth-line therapy had extended progression-free survival when given an intra-patient dose escalation of ripretinib to 150 mg twice a day following progression.

A retrospective analysis showed there were more durable survival outcomes with avapritinib versus other tyrosine kinase inhibitors in adult patients with gastrointestinal stromal tumors and a platelet-derived growth factor receptor A D842V mutation

Experts discuss KIT and PDGFRα D842V-mutations in GIST and present the NAVIGATOR trial.

Presentation and considerations for a case of PDGFRα D842V-mutated GIST.

A panel of experts review the VOYAGER and INTRIGUE trials.

Key opinion leaders consider later lines of therapy in metastatic KIT exon 9–mutated GIST and how to monitor and mitigate toxicities.

The experts discuss the use of imatinib in patients with KIT exon 9-mutated GIST. Additionally, they comment on surgical options for patients with GIST.

The experts present and discuss a case of a patient with KIT exon 9-mutated GIST, an including an overview of surgical options.

The panelists discuss the phase 3 INVICTUS trial of ripretinib and the phase 1 study of ripretinib intra-patient dose escalation.

Third-line treatment recommendations for patients with GIST and a discussion on side effect management.

Experts discuss the considerations of lines of therapy, comment on molecular testing, and the role of repeat biopsies.

The experts discuss a case presentation of a 66-year-old woman with heavily pretreated GIST, and comment on follow-up times and treatment options.

In an interview with Targeted Oncology, Margaret von Mehren, MD, reviews the recent advancements in the GIST treatment landscape. She also explains what’s needed to move the needle further in the future.

Adjuvant imatinib has demonstrated significant improvement in relapse-free survival over a 2-year period and a mild trend toward long-term improvement in failure-free survival as treatment of patients with high-risk gastrointestinal stromal tumors, according to 9.1-year follow-up results from a randomized phase 3 study.

In patients with gastrointestinal stromal tumors who have received 3 or more prior therapies, there remain unmet needs to overcome resistance to the standard-of-care, imatinib, a tyrosine kinase inhibitor, and prolong the 6.3-month+ progression-free survival achieved with the FDA-approved TKI ripretinib.

Men appear to be more likely than women to have invasive gastrointestinal stromal tumors originating in the stomach and small intestines. For treatment, an expert says that combined surgery and systemic therapy demonstrates the best outcomes.

An Orphan Drug Designation was granted by the FDA to ilixadencel as use for the treatment of patients with soft tissue sarcoma.

For patients with advanced gastrointestinal stromal tumors, there was continued clinically meaningful benefit with the novel broad-spectrum KIT and PDGFRα inhibitor ripretinib in the fourth line or later, according to updated data from the randomized phase 3 INVICTUS trial presented at the 2020 ESMO Virtual Congress.

In an interview with Targeted Oncology, Ping Chi, MD medical oncologist, Geoffrey Beene Junior Faculty chair, Memorial Sloan Kettering Cancer Center, discussed the phase 2 study of binimetinib in combination with imatinib in patients with untreated advanced GIST.