A majority of patients on imatinib for treatment of GIST or CML had low or absent levels of osteocalcin, a bone marker secreted by osteoblasts, and about 50% of patients had a decrease in bone mineral density, signaling that long-term treatment may affect bone health in these patients.
Gastrointestinal Stromal Tumor
Limited surgical resection of duodenal gastrointestinal stromal tumors resulted in positive outcomes for both local and systemic disease-free survival, according to the results of a small study.
The US Food and Drug Administration approved the multi-kinase inhibitor regorafenib (Stivarga) yesterday, for the treatment of patients with unresectable metastatic gastrointestinal stromal tumors (GIST) that no longer respond to imatinib and sunitinib.
Assigning patients with gastrointestinal stromal tumor (GIST) to undergo surgical resection of residual tumor after disease control with maintenance imatinib was beneficial to patient survival, according to the results of a retrospective study presented at the ASCO 2013 Gastrointestinal Cancers Symposium.
The use of imatinib mesylate preoperatively for a maximum of 12 months resulted in a high rate of complete microscopic resection in a group of patients with marginally resectable gastrointestinal stromal tumor (GIST), according to the results of a phase II trial.
We describe areas where major inroads were initially achieved by targeting angiogenesis and by unraveling pathways in the heterogeneous tumors of mesenchymal origin—spurred by the identification of c-Kit–activating mutations in GIST and the regressions that ensued when tumors harboring these mutations were exposed to the tyrosine kinase inhibitor imatinib (Gleevec).
Treatment of gastrointestinal stromal tumor (GIST) with regorafenib after prior treatment failure with both imatinib and sunitinib resulted in a PFS survival benefit for patients across all prespecified subgroups.
Though the calcium-dependent chloride channel DOG1 is strongly expressed in gastrointestinal stromal tumors (GIST), a new laboratory study suggests that methods targeting it for therapies in treating these cancers are still a ways off.
The FDA has granted imatinib full approval as an adjuvant treatment following surgical removal of CD117-positive gastrointestinal stromal tumors in adult patients. This comes after results from a phase III trial showed that patients taking imatinib for 36 months had a 5-year overall survival of 92%, compared to 82% for those patients who took the drug for the standard 12 months of treatment.
GIST (Gastrointestinal Stromal Tumor) Endoscopic Appearance