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File:Histopathology of non-complex endometrial polyp without atypia.jpg|'''Non-complex endometrial polyp without atypia''', with a thick-walled blood vessel in middle - typical of endometrial polyps. Glands are regular.

File:Histopathology of complex hyperplasia without atypia.jpg|'''Complex hyperplasia without atypia''': Cystically dilated endometrial glands lined by a single layer of columnar epithelium.<ref>{{cite journal|last1=Rao|first1=Shalinee|last2=Sundaram|first2=Sandhya|last3=Narasimhan|first3=Raghavan|title=Biological behavior of preneoplastic conditions of the endometrium: A retrospective 16-year study in south India|journal=Indian Journal of Medical and Paediatric Oncology|volume=30|issue=4|year=2009|pages=131|issn=0971-5851|doi=10.4103/0971-5851.65335}}<br>- [https://www.researchgate.net/figure/Cystically-dilated-endometrial-glands-lined-by-a-single-layer-of-columnar-epithelium_fig1_46256480 Figure- available via license: Creative Commons Attribution 2.0 Generic]</ref>

File:Histopathology of complex hyperplasia with atypia.jpg|'''Complex hyperplasia with atypia''': Closely packed endometrial glands with sparse intervening stroma and stratification of the lining epithelium. Epithelial cells show cytological atypia with high nucleocytoplasmic ratio, irregular clumping of nuclear chromatin, and mitotic figures.<ref>{{cite journal|last1=Rao|first1=Shalinee|last2=Sundaram|first2=Sandhya|last3=Narasimhan|first3=Raghavan|title=Biological behavior of preneoplastic conditions of the endometrium: A retrospective 16-year study in south India|journal=Indian Journal of Medical and Paediatric Oncology|volume=30|issue=4|year=2009|pages=131|issn=0971-5851|doi=10.4103/0971-5851.65335}}<br>- [https://www.researchgate.net/figure/Closely-packed-endometrial-glands-with-sparse-intervening-stroma-and-stratification-of_fig2_46256480 Figure- available via license: Creative Commons Attribution 2.0 Generic]</ref>