preferred_name: Distance of carcinoma from closest mucosal margin when all mucosal margins are uninvolved
preferred_name_lc: distance of carcinoma from closest mucosal margin when all mucosal margins are uninvolved
label: Distance of carcinoma from closest mucosal margin when all mucosal margins are uninvolved
label_lc: distance of carcinoma from closest mucosal margin when all mucosal margins are uninvolved