preferred_name: Radial position of closest mucosal margin when mucosal margin uninvolved by invasive carcinoma
preferred_name_lc: radial position of closest mucosal margin when mucosal margin uninvolved by invasive carcinoma
label: Radial position of closest mucosal margin when mucosal margin uninvolved by invasive carcinoma
label_lc: radial position of closest mucosal margin when mucosal margin uninvolved by invasive carcinoma