Asymptomatic Atypical Hyperplasia and Endometriosis Following Treatment with Tamoxifen: A Case Report and Review of the Literature

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AI-generated summary by claude@2026-06, 2026-06-08

This case report describes atypical hyperplasia and endometriosis discovered in a patient after tamoxifen treatment, followed by a review of similar literature.

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Abstract

BackgroundTamoxifen may cause proliferative effects in the endometrium. Patients on tamoxifen have an increased risk for endometriosis, but are not routinely screened for this.CaseA 49-year-old postmenopausal patient presented for a total laparoscopic hysterectomy and bilateral salpingo-oophorectomy several years after initiating tamoxifen for breast cancer. She had no clinical history to suggest endometriosis, but was found to have extensive pelvic endometriosis intraoperatively with polypoid hyperplasia found on the pathology of the uterine and the ovarian tissue.ConclusionThis is the first case reported of an asymptomatic patient on tamoxifen with a new diagnosis of endometriosis along with atypical hyperplasia in the ectopic tissue. The potential for pre-malignant/malignant transformation may alter the treatment course if identified following tamoxifen exposure.

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Condition tags

endometriosis

MeSH descriptors

Breast Neoplasms Endometriosis Hyperplasia Tamoxifen Breast Neoplasms Breast Neoplasms Endometriosis Endometriosis Endometriosis Female Humans Hyperplasia Hysterectomy Laparoscopy Middle Aged Tamoxifen Tamoxifen Ultrasonography

Citation neighborhood

Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. [ expand to 2 hops ] — adds papers reached through this work's immediate citers/citees. Heavier; up to 60 extra dots.

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Cited by (2)

Source provenance

europepmc
last seen: 2026-07-31T06:09:14.520117+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
pubmed
last seen: 2026-05-13T22:21:47.975235+00:00
License: CC0 · commercial use OK