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HOME > J Pathol Transl Med > Volume 43(6); 2009 > Article
Case Report Cytology of Follicular Dendritic Cell Sarcoma on Intraoperative Touch Imprint Smears: A Case Report.
Ju Young Song, Xian Ji Jin, Jee Young Han, Lucia Kim, In Suh Park, Joon Mee Kim, Young Chae Chu, Suk Jin Choi
Journal of Pathology and Translational Medicine 2009;43(6):589-593
DOI: https://doi.org/10.4132/KoreanJPathol.2009.43.6.589
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1Department of Pathology, Inha University Hospital, Incheon, Korea. 204058@inha.ac.kr
2Department of Pathology, Inha University Graduate School of Medicine, Incheon, Korea.

Follicular dendritic cell (FDC) sarcoma is a neoplastic proliferation of FDCs. Because its cytologic findings can vary widely, both the cytomorphology and histopathology of FDC sarcoma can impose a significant diagnostic dilemma. We present cytologic features of FDC sarcoma assessed by intraoperative touch imprint. Intra-abdominal lymphadenopathies were noted in 54-year-old male with hepatitis B-virus associated liver cirrhosis. In contrast to cytologic features of classical FDC sarcoma, the tumor cells featured a large epithelioid or Reed-Sternberg cell-like shape scattered in a background with abundant inflammatory cells, which led to a mistaken diagnosis of malignant lymphoma. However, in accordance with cytologic features previously described in the literature, the tumor cells were characterized by a fragile cytoplasm with cytoplasmic processes in dendritic or reticulated patterns reminiscent of the ultrastructural features of FDC. Cytoplasmic features rendering nuclei with a tendency to form clusters or syncytial aggregates associated with reactive lymphocytes appear to be the most valuable finding in diagnosis of FDC sarcoma.

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