Pure compared with mixed serous endometrial carcinoma: two different entities?
Thijs Roelofsen1, Maaike A P C van Ham, Johanna M Wiersma van Tilburg
1Department of Obstetrics and Gynecology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands. T.Roelofsen@obgyn.umcn.nl
Obstetrics and Gynecology
|November 22, 2012
Summary
Pure uterine papillary serous carcinoma histology increases recurrence and death risk compared to mixed histology. Endometrial intraepithelial carcinoma is common in both, but non-neoplastic endometrium differs between pure and mixed uterine papillary serous carcinoma.
Area of Science:
- Gynecologic Oncology
- Pathology
- Cancer Research
Background:
- Uterine papillary serous carcinoma (UPSC) is an aggressive subtype of endometrial cancer.
- Understanding the impact of histological variants and precursor lesions is crucial for prognosis.
Purpose of the Study:
- To investigate if mixed versus pure UPSC histology influences clinical outcomes.
- To assess the association of UPSC with endometrial intraepithelial carcinoma (EIC).
Main Methods:
- Multi-institution observational study of 108 UPSC patients (stages I-IV).
- Histopathologic review by expert pathologists to determine serous histology percentage.
- Evaluation of the endometrium for EIC and assessment of endometrial changes.
Main Results:
- Pure UPSC histology was associated with increased risk of recurrence (HR 2.9) and death (HR 2.6) compared to mixed UPSC.
- Advanced FIGO stage and lymphovascular space invasion also predicted recurrence.
- EIC was found in 83.9% of cases; atrophic endometrium was more common in pure UPSC, while hyperplastic endometrium with atypia was more common in mixed UPSC.
Conclusions:
- Pure UPSC histology is a significant independent risk factor for recurrence and poor survival.
- FIGO stage remains a critical prognostic factor.
- The distinct non-neoplastic endometrial findings in pure versus mixed UPSC warrant further investigation.
