Mesonephric-like adenocarcinoma as an unexpected histological result after fertility saving procedure for presumed adenomyosis: a case report - Report - MDSpire

Mesonephric-like adenocarcinoma as an unexpected histological result after fertility saving procedure for presumed adenomyosis: a case report

  • By

  • Vojtěch Lukavec

  • Filip Frühauf

  • Zdenka Lisa

  • Jan Galko

  • Pavel Dundr

  • Michal Mara

  • June 5, 2026

  • 0 min

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Clinical Report: Unexpected Diagnosis of Mesonephric-like Adenocarcinoma

Overview

This case report details the diagnosis of mesonephric-like adenocarcinoma in a 41-year-old patient initially treated for adenomyosis. The findings underscore the importance of thorough evaluation of atypical myometrial lesions to avoid diagnostic pitfalls.

Background

Adenomyosis is a common condition associated with infertility, often complicating management in reproductive medicine. Misdiagnosis can lead to significant consequences, including the oversight of malignancies that may mimic benign conditions. This case highlights the need for vigilance in evaluating myometrial lesions, particularly in patients seeking fertility preservation.

Data Highlights

No numerical data or trial data provided in the article.

Key Findings

  • A 41-year-old patient presented with primary infertility and a myometrial mass diagnosed as diffuse adenomyosis.
  • Histopathological examination revealed mesonephric-like adenocarcinoma, leading to a total abdominal hysterectomy.
  • The patient underwent six cycles of chemotherapy with paclitaxel and carboplatin plus pembrolizumab.
  • Malignant transformation of adenomyosis is rare but can occur, necessitating careful evaluation of atypical lesions.
  • MLA is characterized by aggressive behavior and a higher likelihood of advanced-stage disease compared to other endometrial cancers.

Clinical Implications

Clinicians should maintain a high index of suspicion for malignancy in patients with atypical myometrial lesions, even when they present with symptoms suggestive of adenomyosis. Comprehensive preoperative evaluation and histopathological assessment are critical in guiding appropriate management.

Conclusion

This case emphasizes the importance of thorough diagnostic processes in reproductive health, particularly when atypical findings are present. Awareness of the potential for malignancy in cases of suspected adenomyosis is essential for optimal patient outcomes.

Related Resources & Content

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  3. NCCN Guidelines® Insights: Uterine Neoplasms, Version 3.2025 - PubMed
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  5. Frontiers in Oncology — Exceptional response to everolimus in an NF1-deficient recurrent endometrioid adenocarcinoma: a case report
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  9. NCCN Guidelines® Insights: Uterine Neoplasms, Version 3.2025 - PubMed
  10. Policy Review
  11. Mesonephric-like Adenocarcinoma (MLA) Diagnostic Criteria and Controversies: Perspectives and Guidance From Pathologists in the MLA Consortium - PMC
  12. Endometrial mesonephric-like adenocarcinoma: Clinicopathologic features, treatment, and outcomes - PMC
  13. Mesonephric-Like Adenocarcinoma of the Endometrium: Diagnostic Advances to Spot This Wolf in Sheep’s Clothing. A Review of the Literature - PMC

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