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| ==Simple endometrial hyperplasia== | | ==Simple endometrial hyperplasia== |
| *[[AKA]] ''simple hyperplasia''. | | *[[AKA]] ''simple hyperplasia''. |
| ===General===
| | {{Main|Simple endometrial hyperplasia}} |
| *More common than simple endometrial hyperplasia with atypia.
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| *Very low risk for progressing to [[endometrioid endometrial carcinoma]].
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| ===Microscopic===
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| Features:<ref name=Ref_GP236>{{Ref GP|236}}</ref>
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| *Irregular dilated glands (with large lumens) - '''key feature'''.
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| **Glands described as "animal shapes".
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| *Variation of gland size.
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| *No nuclear atypia.
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| **Uniform columnar nuclei.
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| *Normal gland density (gland area in plane of section/total area ~= 1/3).
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| DDx:
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| *[[Disordered proliferative phase]].
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| *[[Complex endometrial hyperplasia]] - has increased gland-to-stroma ratio.
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| *[[Atrophic endometrium|Cystic atrophy of the endometrium]] - does not have proliferative activity.<ref name=pmid16873562>{{Cite journal | last1 = McCluggage | first1 = WG. | title = My approach to the interpretation of endometrial biopsies and curettings. | journal = J Clin Pathol | volume = 59 | issue = 8 | pages = 801-12 | month = Aug | year = 2006 | doi = 10.1136/jcp.2005.029702 | PMID = 16873562 | PMC = 1860448 }}</ref>
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| *[[Benign endometrial polyp]] - has thick-walled blood vessels; simple endometrial hyperplasia should not be diagnosed in a polyp.<ref name=pmid16873562/>
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| ====Images====
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| <gallery>
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| Image:Simple_endometrial_hyperplasia_-_low_mag.jpg | Simple endometrial hyperplasia - low mag. (WC)
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| Image:Simple_endometrial_hyperplasia_-_high_mag.jpg | Simple endometrial hyperplasia - high mag. (WC)
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| </gallery>
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| www:
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| *[http://www.webpathology.com/image.asp?n=1&Case=568 Simple endometrial hyperplasia without atypia (webpathology.com)].
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| ==Simple endometrial hyperplasia with atypia== | | ==Simple endometrial hyperplasia with atypia== |