Difference between revisions of "Benign endometrial polyp"
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| Grossing = | | Grossing = | ||
| Site = [[endometrium]] | | Site = [[endometrium]] | ||
| Assdx = [[invasive breast cancer]] - specifically assoc. with tamoxifen | | Assdx = [[invasive breast cancer]] - specifically assoc. with [[tamoxifen]] | ||
| Syndromes = | | Syndromes = | ||
| Clinicalhx = bleeding ([[menorrhagia]]) | | Clinicalhx = bleeding ([[menorrhagia]]) | ||
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| ClinDDx = [[uterine leiomyoma|leiomyoma]], other polypoid masses | | ClinDDx = [[uterine leiomyoma|leiomyoma]], other polypoid masses | ||
}} | }} | ||
:''Uterine polyp'' | :''Uterine polyp'' and ''endometrial polyp'' redirect here. | ||
'''Benign endometrial polyp''', abbreviated '''BEP''', is a common diagnosis in [[endometrium|endometrial]] specimens. | '''Benign endometrial polyp''', abbreviated '''BEP''', is a common diagnosis in [[endometrium|endometrial]] specimens. | ||
Latest revision as of 18:27, 30 August 2023
| Benign endometrial polyp | |
|---|---|
| Diagnosis in short | |
 Endometrial polyp (right - fibrotic stroma). H&E stain. | |
|
| |
| LM | large blood vessels (muscular), fibrotic stroma, polypoid shape (epithelium on three sides), +/-gland dilation |
| LM DDx | adenofibroma, cervical polyp - have endocervical mucosa, lower uterine segment, endometrial carcinoma, simple endometrial hyperplasia, disordered proliferative endometrium |
| Gross | polypoid mass in the endometrial cavity |
| Site | endometrium |
|
| |
| Associated Dx | invasive breast cancer - specifically assoc. with tamoxifen |
| Clinical history | bleeding (menorrhagia) |
| Prevalence | common |
| Prognosis | benign |
| Clin. DDx | leiomyoma, other polypoid masses |
- Uterine polyp and endometrial polyp redirect here.
Benign endometrial polyp, abbreviated BEP, is a common diagnosis in endometrial specimens.
It is also simply known as endometrial polyp which is a somewhat ambiguous descriptor as not all endometrial polyps are benign.
General
- Very common.
- May be a cause of menorrhagia (heavy & long menses).
- Malignant endometrial polyps are uncommon: <2% in one series of 965 cases.[1]
Gross
- Polypoid mass in the endometrial cavity.
Notes:
- May be large - 10 cm.[2]
Gross DDx:
- Secretory phase endometrium.[3]
- Pedunculated leiomyoma.
Microscopic
Features - diagnostic criteria:[3]
- Large blood vessels (muscular) - key feature.
- Fibrotic stroma - key feature.
- Polypoid shape - epithelium on three sides.
- May not be seen... as polyp is fragmented on removal.
Glandular changes common:[3]
- Endometrial glands may be out of phase with surrounding endometrium.
- Often proliferative.
- +/-Cystic dilation of glands/unusual shapes
- Simple endometrial hyperplasia should not be diagnosed in a polyp!
- +/-Focal gland crowding.
Notes:
- Apparently benign polyps should be examined closely at the surface for in situ & invasive malignancies.
- Stroma often cellular.
DDx:
- Adenofibroma.
- Cervical polyp - have endocervical mucosa.
- Lower uterine segment - have endocervical epithelium and lack the thick-walled blood vessels.[3]
- Endometrial carcinoma - esp. serous carcinoma of the endometrium.
- Simple endometrial hyperplasia.
- Disordered proliferative endometrium.
Images
Endometrial polyp - low mag. (WC)
Endometrial polyp - intermed. mag. (WC)
Endometrial polyp - intermed. mag. (WC)
Endometrial polyp - low mag. (WC)
IHC
- p16 stroma usually +ve.[4]
Sign out
Non-proliferative
ENDOMETRIUM, CURETTAGE: - BENIGN ENDOMETRIAL POLYP.
ENDOMETRIUM ("POLYPS"), REMOVAL:
- BENIGN ENDOMETRIAL POLYPS WITH CYSTIC GLANDULAR DILATION AND
WITHOUT APPARENT PROLIFERATIVE ACTIVITY.
Extensive surface denudation
POLYP, ENDOMETRIUM, REMOVAL: - BENIGN LARGE ENDOMETRIAL POLYP WITH EXTENSIVE DENUDATION OF THE SURFACE AND INFLAMMATION, WITHOUT APPARENT PROLIFERATIVE ACTIVITY. - BLOOD (ABUNDANT), FIBRIN AND CELLULAR DEBRIS.
Suggestive of polyp
ENDOMETRIUM, CURETTAGE: - POLYPOID NONPROLIFERATIVE ENDOMETRIUM WITH FOCALLY PROMINENT SMALL BLOOD VESSELS AND FIBROUS STROMA, SUGGESTIVE OF BENIGN POLYP. - NEGATIVE FOR HYPERPLASIA AND NEGATIVE FOR MALIGNANCY.
Proliferative
ENDOMETRIUM, CURETTAGE: - BENIGN ENDOMETRIAL POLYP WITH PROLIFERATIVE ACTIVITY.
Note:
- It is useful to comment on whether non-polypoid endometrium is proliferative (if present), esp. in menopausal women.[3]
Polyp with disordered proliferative phase in the background
ENDOMETRIUM, BIOPSY: - BENIGN ENDOMETRIAL POLYP WITH PROLIFERATIVE GLANDS AND FOCAL GLAND DILATION. - SUSPICIOUS FOR A BACKGROUND OF DISORDERED PROLIFERATIVE PHASE ENDOMETRIUM, SEE COMMENT. - STRIPPED BENIGN ENDOCERVICAL EPITHELIUM. COMMENT: The endometrium sampled is proliferative with focal gland dilation throughout. The features of a polyp (large muscular blood vessels, fibrous stroma and polypoid fragments of endometrium) are only focally present, suggesting there is a background of disordered proliferative phase endometrium. Clinical correlation is suggested.
Clinically a polyp but not apparent on histology
UTERUS (POLYP), REMOVAL: - LARGE FRAGMENT OF SECRETORY PHASE ENDOMETRIUM WITH LARGE BLOOD VESSELS, A NON-FIBROUS STROMA AND NO DISCERNIBLE SURFACE EPITHELIUM.
See also
References
- ↑ Tang, Z.; Zhou, R.; Bao, D.; Liu, C.; Wei, L. (Mar 2014). "[Clinical characteristics of 42 cases of malignant endometrial polyps].". Zhonghua Fu Chan Ke Za Zhi 49 (3): 204-7. PMID 24820306.
- ↑ Unal, B.; Doğan, S.; Karaveli, FŞ.; Simşek, T.; Erdoğan, G.; Candaner, I. (2014). "Giant Endometrial Polyp in a Postmenopausal Woman without Hormone/Drug Use and Vaginal Bleeding.". Case Rep Obstet Gynecol 2014: 518398. doi:10.1155/2014/518398. PMID 25093134.
- ↑ 3.0 3.1 3.2 3.3 3.4 McCluggage, WG. (Aug 2006). "My approach to the interpretation of endometrial biopsies and curettings.". J Clin Pathol 59 (8): 801-12. doi:10.1136/jcp.2005.029702. PMC 1860448. PMID 16873562. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1860448/.
- ↑ Moritani, S.; Ichihara, S.; Hasegawa, M.; Iwakoshi, A.; Murakami, S.; Sato, T.; Okamoto, T.; Mori, Y. et al. (Aug 2012). "Stromal p16 expression differentiates endometrial polyp from endometrial hyperplasia.". Virchows Arch 461 (2): 141-8. doi:10.1007/s00428-012-1276-1. PMID 22772724.