Epstein-Barr virus-positive inflammatory follicular dendritic cell sarcoma presenting as a solitary colonic mass: two rare cases and a literature review
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.
基金:
Science and Technology Planning Project of Wuhan [2017060201 010172]; Guidance Foundation of Renmin Hospital of Wuhan University [RMYD2018M27]
第一作者单位:[1]Wuhan Univ, Renmin Hosp, Dept Pathol, Wuhan, Peoples R China
通讯作者:
推荐引用方式(GB/T 7714):
Ke Xiaokang,He Huihua,Zhang Qingping,et al.Epstein-Barr virus-positive inflammatory follicular dendritic cell sarcoma presenting as a solitary colonic mass: two rare cases and a literature review[J].HISTOPATHOLOGY.2020,77(5):832-840.doi:10.1111/his.14169.
APA:
Ke, Xiaokang,He, Huihua,Zhang, Qingping,Yuan, Jingping&Ao, Qilin.(2020).Epstein-Barr virus-positive inflammatory follicular dendritic cell sarcoma presenting as a solitary colonic mass: two rare cases and a literature review.HISTOPATHOLOGY,77,(5)
MLA:
Ke, Xiaokang,et al."Epstein-Barr virus-positive inflammatory follicular dendritic cell sarcoma presenting as a solitary colonic mass: two rare cases and a literature review".HISTOPATHOLOGY 77..5(2020):832-840