According to the 2020 World Health Organization classification, mesonephric-like adenocarcinoma (MLA) is newly categorized as a subtype of endometrial carcinoma and remains a relatively unknown disease owing to its rarity. To the best of our knowledge, radiological findings of MLA have not been reported in the English literature. The uterine MLAs show a worse clinical prognosis and a more aggressive biological behavior than the usual endometrial carcinoma. Herein, we present the imaging findings of a 65-year-old female with a MLA in the uterine corpus. The tumor was a solid endometrial mass with deep myometrial invasion, poor contrast enhancement, and moderate diffusion restriction.
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http://dx.doi.org/10.3348/jksr.2022.0119 | DOI Listing |
Jpn J Clin Oncol
January 2025
Department of Gynecology, National Cancer Center Hospital, 5-1-1 Tsukiji, Chuo-ku, Tokyo 104-0045, Japan.
There are many histologic types of gynecologic malignancies. I reviewed three rare ovarian tumor types that have poor prognoses. Ovarian mesonephric-like adenocarcinoma (MLA) is a newly described histological type known for its aggressive behavior.
View Article and Find Full Text PDFInt J Gynecol Pathol
January 2025
Department of Obstetrics & Gynecology, Division of Gynecologic Oncology.
We sought to present and describe all cases of mesonephric adenocarcinoma (MNAC) and mesonephric-like adenocarcinomas (MLAs) at our institution. These cancers are rare, morphologically similar tumors of the female reproductive tract. In this case series, we present 13 new cases of MNAC/MLA that were identified at St.
View Article and Find Full Text PDFJ Surg Case Rep
January 2025
Department of Pathology of the National Institute of Oncology, Ibn Sina University Hospital Center, Allal Al Fassi Avenue, Rabat 10100, Morocco.
Mesonephric-like adenocarcinoma (MLA) is a rare and newly recognized subtype of ovarian and endometrial carcinomas, introduced in the 2020 World Health Organization Classification. This tumor likely originates from Müllerian-derived tissues and often mimics more common ovarian cancers, leading to frequent misdiagnosis. This case study details a 36-year-old woman who presented with urinary symptoms following a hysterectomy.
View Article and Find Full Text PDFInt J Surg Pathol
January 2025
Department of Pathology, UT Southwestern Medical Center, Dallas, TX, USA.
Mesonephric-like adenocarcinoma (MLA) is a newly recognized type of carcinoma that occurs in the uterus and ovaries. MLA exhibits distinct morphological and immunophenotypical features similar to those of mesonephric carcinoma of the cervix or vagina, with the majority of reported tumors containing mutations. MLA is exceedingly rare and appears to be associated with aggressive clinical behavior.
View Article and Find Full Text PDFHistopathology
December 2024
Pathology and Laboratory Medicine, University of British Columbia and Vancouver General Hospital, Vancouver, BC.
Aims: Mesonephric-like adenocarcinoma (MLA) of the endometrium is often a diagnostic challenge, due to its morphological resemblance to other more common Müllerian neoplasms. This study aimed to retrospectively identify overlooked MLA in a large endometrial carcinoma cohort, using a combination of immunohistochemistry (IHC), morphology and KRAS sequencing.
Methods And Results: IHC was conducted on 1094 endometrial carcinomas, identifying 16 potential MLA cases based on GATA3+ and/or TTF1+ and ER- staining patterns, which subsequently underwent detailed histological review, KRAS sequencing and ProMisE molecular classification.
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