A binary architectural grading system for uterine endometrial endometrioid carcinoma has superior reproducibility compared with FIGO grading and identifies subsets of advance-stage tumors with favorable and unfavorable prognosis. - Lax,S.F.; Kurman,R.J.; Pizer,E.S.; Wu,L.; Ronnett,B.M. (Am J Surg Pathol, 2000)