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DOI: 10.5146/tjpath.2023.01600 |
Epstein-Barr Virus-Positive Leiomyosarcoma in Immunocompetent Patients |
Hassan AL-TARAWNEH1, Alpaslan ALP2, Gokhan GEDIKOGLU3, Kemal KOSEMEHMETOGLU3 |
1Mutah University, Faculty of Medicine, AL-KARAK, JORDAN
2Department of Microbiology, Hacettepe University, Faculty of Medicine, ANKARA, TURKEY
3Department of Pathology, Hacettepe University, Faculty of Medicine, ANKARA, TURKEY |
Keywords:
EBER, Smooth muscle tumor, EBV, Leiomyosarcoma |
Objective: Epstein-Barr Virus–Associated Smooth Muscle Tumor (EBV-SMT) is a rare tumor with a higher rate of occurrence in unusual
locations in the setting of immunodeficiency. In this study, we evaluated a cohort of ordinary leiomyosarcomas (LMS) for the presence of EBV
and described the clinicopathological features deviating from routinely diagnosed cases of EBV-SMT.
Material and Method: The sections of tissue microarrays including 93 classical LMS occurring in various locations were hybridized with EBER
and stained for LMP1 antibody using the Leica Bond Autostainer. EBV real-time PCR assay was performed in 2 EBER-positive cases.
Results: Among the 93 LMS cases, 2 non-uterine cases (2.2%) were positive for EBER and negative for LMP1, and were referred to as “EBV-positive
LMS”. Both were females in their 6th decade without immunosuppression. EBV real-time PCR assay revealed the presence of EBV in one of
the cases. Tumors were located in the pancreas and chest wall. Morphologically, tumors were rather myxoid, multinodular, and composed
of long fascicles of spindle cells with intermediate- to high-grade features. High mitotic activity and focal necrosis were present, whereas no
accompanying lymphocytes were detected. One of the patients developed metastatic disease after 3 years.
Conclusion: EBV-positive LMS occurring in immunocompetent patients has features distinct from classical EBV-SMT seen in immunosuppressed
patients.
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