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Difference between revisions of "Simple endometrial hyperplasia"
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'''Simple endometrial hyperplasia''', abbreviated '''SEH''', is an uncommon pre-malignant change of the [[endometrium]]. Like [[complex endometrial hyperplasia]], it is subdivided into ''with atypia'' and ''without atypia''. | |||
==General== | |||
*More common than simple endometrial hyperplasia with atypia. | |||
*Very low risk for progressing to [[endometrioid endometrial carcinoma]]. | |||
==Microscopic== | |||
Features:<ref name=Ref_GP236>{{Ref GP|236}}</ref> | |||
*Irregular dilated glands (with large lumens) - '''key feature'''. | |||
**Glands described as "animal shapes". | |||
*Variation of gland size. | |||
*No nuclear atypia. | |||
**Uniform columnar nuclei. | |||
*Normal gland density (gland area in plane of section/total area ~= 1/3). | |||
*+/-Nuclear atypia:<ref>{{Cite journal | last1 = Silverberg | first1 = SG. | title = Problems in the differential diagnosis of endometrial hyperplasia and carcinoma. | journal = Mod Pathol | volume = 13 | issue = 3 | pages = 309-27 | month = Mar | year = 2000 | doi = 10.1038/modpathol.3880053 | PMID = 10757341 }}</ref> | |||
**Loss of basal nuclear stratification. | |||
**Nuclear size variation. | |||
**Nuclear rounding. | |||
***Nuclei lacking atypical = uniform columnar nuclei. | |||
**Nucleoli. | |||
**Hyperchromasia or vesicular nuclei. | |||
Notes: | |||
*There are no universally accepted criteria for atypia. Different sources list different features. | |||
*A proposal for atypia (all should be present): | |||
*#Increased NC ratio. | |||
*#*Atypical: ~ 1:2 | |||
*#*Not atypical: ~1:3. | |||
*#Oval nuclei with small major axis to minor axis ratio. | |||
*#*Atypical: major axis:minor axis = <=2:1. | |||
*#*Not atypical: major axis:minor axis = >=3:1 | |||
*#**NB: round nuclei: major axis:minor axis = 1:1. | |||
*#Small nucleoli (~1/5 the size of the nucleus). | |||
DDx: | |||
*[[Disordered proliferative phase]]. | |||
*[[Complex endometrial hyperplasia]] - has increased gland-to-stroma ratio. | |||
*[[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> | |||
*[[Benign endometrial polyp]] - has thick-walled blood vessels; simple endometrial hyperplasia should not be diagnosed in a polyp.<ref name=pmid16873562/> | |||
===Images=== | |||
<gallery> | |||
Image:Simple_endometrial_hyperplasia_-_low_mag.jpg | Simple endometrial hyperplasia - low mag. (WC) | |||
Image:Simple_endometrial_hyperplasia_-_high_mag.jpg | Simple endometrial hyperplasia - high mag. (WC) | |||
</gallery> | |||
www: | |||
*[http://www.webpathology.com/image.asp?n=1&Case=568 Simple endometrial hyperplasia without atypia (webpathology.com)]. | |||
==See also== | |||
*[[Endometrium]]. | |||
*[[Endometrial hyperplasia]]. | |||
==References== | |||
{{Reflist|2}} | |||
[[Category:Endometrium]] | |||
[[Category:Diagnosis]] | [[Category:Diagnosis]] | ||