New Perspectives in Multiple Primary Colorectal Cancer: A Surgical Approach.

Background: We identify the features of multiple primary colorectal cancer (MPCC), synchronous colorectal cancer (SCRC) and metachronous colorectal cancer (MCRC), and distinguish between the cases that require a more extensive surgery and those where the parameters of SCRC might be important to prevent the development of MCRC.

Methods: We gathered up consecutive individuals with MPCC, 50 for each category, and 100 consecutive individuals diagnosed with 'single' colorectal cancer. Clinical and familiar information was obtained.

Toward a Molecular Classification of Synchronous Colorectal Cancer: Clinical and Molecular Characterization.

Background: Two or more primary colorectal tumors coexisting at the time of diagnosis are considered to be synchronous tumors. It is estimated that synchronous colorectal cancer (SCRC) only accounts for 1.1% to 8.