Complete remission of a metastatic gastrointestinal stromal tumour with the tyrosine kinase inhibitor imatinib (STI 571): effect of low dosage in an advanced tumour with exon 11 mutation.

Abstract excerpt

We report a 51-year-old man with an advanced malignant metastatic gastrointestinal stromal tumour, who showed a complete response after 5 months of treatment with imatinib at a dose of 400 mg per day. An early treatment response was demonstrated in an 18fluorodeoxyglucose positron emission tomography scan after 1 month of therapy. Complete remission was documented histologically by negative serial biopsies of...

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