The drug, Gavreto, is an oral therapy which selectively targets so-called RET-altered cancers that have mutations that drive tumor growth, which are detected by a test approved by the U.S. Food and Drug Administration.

Swiss drugmaker Roche in July struck a pact worth up to $1.7 billion with Blueprint Medicines, for rights to Gavreto, which also awaits FDA approval for treating advanced RET mutant and RET fusion-positive thyroid cancers.

The drug will be jointly marketed in the United States and will be available within a week, Blueprint said.

Only about 1-2% of patients with NSCLC have RET fusions, according to Roche.

(Reporting by Manojna Maddipatla in Bengaluru; Editing by Sandra Maler)