PubMed:10223563 / 175-486 JSON TXT

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Id	Subject	Object	Predicate	Lexical cue
T1	0-311	BACKGROUND	denotes	Hyperplastic ductal lesions of the pancreas are believed to represent precursors of ductal adenocarcinoma. The most frequent mutation in manifest ductal carcinoma of the pancreas is the K-ras mutation at codon 12. The frequency and significance of this mutation in precursor lesions are a matter of controversy.