Follicular dendritic cell sarcoma: two rare cases and a brief review of the literature

Abstract

Yuan Ma,1,* Jujie Sun,2,* Cuicui Yang,1 Dandan Yuan,3 Jie Liu3 1Department of Oncology, Shandong Cancer Hospital & Institute, School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Shandong Province, People’s Republic of China; 2Department of Pathology, 3Department of Oncology, Shandong Cancer Hospital & Institute, Jinan, Shandong Province, People’s Republic of China*These authors contributed equally to this work Abstract: Follicular dendritic cell sarcoma (FDCS) is a rare malignant tumor recognized in recent years. It accounts for only 0.4% of soft-tissue sarcomas, and its underlying causes are largely unknown. A correct diagnosis can be difficult to make. Diagnosis of FDCS depends on the combined clinical examination, histopathologic features, electron microscopic examination and confirmation with immunohistochemical studies. Here, we report two rare cases of FDCS: one case involving multiple bones, and the other involving extensive abdominal and pelvic cavities. Clinical, histopathological, and immunohistochemical aspects, therapeutic options, and a related literature review of the two cases are discussed. As the prevalence of FDCS is increasing, the details of these rare cases may highlight the importance and facilitate treatment of similar diseases. Keywords: FDCS, bone, abdominal cavity, pelvic cavity, diagnosis, therapy