I think the tweet was about '113 rather than the old Iclusig because of the keyword "BTD" mentioned in the post? I don't find any news release from Ariad website which mentioned Iglusig receiving BTD status like '113.
Also pay attention to the text "better chat with FDA before submitting" which appears like a recommendation of a proper way for getting the work done. This suggests someone is working on submitting (accelerated) approval for '113.
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