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Epstein-Barr virus-positive inflammatory follicular dendritic cell sarcoma presenting as a solitary colonic mass: two rare cases and a literature review

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单位: [1]Wuhan Univ, Renmin Hosp, Dept Pathol, Wuhan, Peoples R China [2]Huazhong Univ Sci & Technol, Sch Basic Med, Dept Pathophysiol, Wuhan, Peoples R China [3]Huazhong Univ Sci & Technol,Tongji Med Coll,Tongji Hosp,Inst Pathol,Jiefang Dadao 1095,Wuhan 430030,Peoples R China
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关键词: colonic EBV follicular dendritic cell sarcoma inflammatory

摘要:
Aims: Follicular dendritic cell (FDC) sarcoma is a rare neoplasm originating from follicular dendritic cells in germinal centres. It is classified as conventional and Epstein-Barr virus (EBV)-positive inflammatory FDC sarcoma according to the 2019 World Health Organization classification of digestive system tumours; the latter is rarer. So in view of the rarity and difficulty in diagnosis, the aim of the manuscript is to share our experience of diagnosing EBV-positive inflammatory FDC sarcoma. Methods and results: Here, we describe the clinicopathological features, gross description, histomorphology, immunophenotype, EBV-encoded mRNA (EBER)in-situhybridisation, gene rearrangement and clinical follow-up of two patients with EBV-positive inflammatory FDC sarcoma in the colon, and review the relevant literature. The tumours were found in two males, aged 53 and 48 years, respectively, with a tumour diameter between 10 and 45 mm. Both cases occurred in the colon and presented as pedunculated colonic masses. Microscopically, scanty atypical ovoid to spindle neoplastic cells were mixed in a background of florid lymphoplasmacytic infiltration. The nuclei of these atypical cells showed vesicular chromatin and small, distinct nucleoli. Immunohistochemistry demonstrated that the atypical stromal cells were positive for CD21, CD23, CD35, and D2-40. EBERin-situhybridisation also gave positive results in two cases. There was a mean follow-up of 9 months (range, 7-11 months). Conclusion: EBV-positive inflammatory FDC sarcoma is an extremely rare tumour with a distinct morphology and phenotype. Therefore, it is very important to recognise it particularly for correct diagnosis and prevention of misdiagnosis and mistreatment.

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出版当年[2019]版:
大类 | 3 区 医学
小类 | 2 区 病理学 4 区 细胞生物学
最新[2025]版:
大类 | 2 区 医学
小类 | 2 区 细胞生物学 2 区 病理学
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出版当年[2018]版:
Q2 PATHOLOGY Q3 CELL BIOLOGY
最新[2023]版:
Q1 PATHOLOGY Q2 CELL BIOLOGY

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第一作者单位: [1]Wuhan Univ, Renmin Hosp, Dept Pathol, Wuhan, Peoples R China
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