Solid Tumor Rules 2018

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site-specific rules for instruction on which rules to use. •Tumors diagnosed 01/01/2007 through 12/31/2017: Use 2007 MPH Rules •Tumors diagnosed 01/01/2018 and later: Use 2018 Solid Tumor Rules (with exceptions in #4) •An original tumor diagnosed before 1/1/2018 and a subsequent tumor diagnosed 1/1/2018 or later in the same primary site

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