High level of CA 125 due to large endometrioma
Case report
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⤵ 5 in-corpus citations
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This case report details a 45-year-old woman with a large ovarian endometrioma and elevated CA 125 levels, demonstrating that high CA 125 can occur in benign gynecological conditions.
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Abstract
BACKGROUND: CA 125 is a tumor-associated antigen. Its high levels are usually associated with ovarian malignancies, whereas smaller increases in the levels were associated with benign gynecologic conditions. The authors report a high level of CA 125 in a case of large ovarian endometrioma.
CASE REPORT: A 45-year-old nulliparous Thai woman, presented with an increase of her abdominal girth for 7 months. Transabdominal ultrasonogram demonstrated a large ovarian cyst and multiple small leiomyoma uteri, and serum CA 125 level was 1,006 U/ml. The preoperative diagnosis was ovarian cancer with leiomyoma uteri. Exploratory laparotomy was performed. There were a large right ovarian endometrioma, small left ovarian endometrioma and multiple small leiomyoma. Total abdominal hysterectomy and bilateral salpingo-oophorectomy was performed and histopathology confirmed the diagnosis of endometrioma and leiomyoma. The serum CA 125 level declined to non-detectable at the 4th week. She was well at discharge and throughout her 4th week follow-up period
CONCLUSION: Although a very high level of CA 125 is associated with a malignant process, it can also be found in benign conditions such as a large endometrioma. The case emphasizes the association of high levels of CA 125 with benign gynecologic conditions.
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References (20)
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Cited by (5)
- Adnexal mass with extremely high levels of CA-125 and CA19-9 but normal Human Epididymis Protein 4 (HE4) and Risk of Ovarian Malignancy Algorithm (ROMA): Endometriosis or ovarian malignancy? A case report 2018
- High CA – 125 in Patients with Endometrioma 2017
- Adenomyosis With Extremely Elevated CA 125 Levels 2009
- Identifying biomarkers of endometriosis using serum protein fingerprinting and artificial neural networks 2008
- Artificial neural networks combined with surface-enhanced laser desorption/ionization mass spectra distinguish endometriosis from healthy population 2007
Source provenance
- europepmc
- last seen: 2026-10-11T09:27:45.537177+00:00
- openalex
- last seen: 2026-06-04T00:00:01.174412+00:00
- pubmed
- last seen: 2026-10-08T21:02:47.667321+00:00
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