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Table 1 Type of endometrial hyperplasia and rate of progression to cancer [20].

From: Cancer of the endometrium: current aspects of diagnostics and treatment

Type of hyperplasia Rate of progression
Simple (cystic without atypia) 1
Complex (adenomatous without atypia) 3
Atypical  
   Simple (cystic with atypia) 8
   Complex (adenomatous with atypia) 29