PMID- 35473698 OWN - NLM STAT- MEDLINE DCOM- 20220428 LR - 20240426 IS - 1757-790X (Electronic) IS - 1757-790X (Linking) VI - 15 IP - 4 DP - 2022 Apr 26 TI - Follicular dendritic cell sarcoma of the thigh: a clinicopathological report and management approach. LID - 10.1136/bcr-2021-244812 [doi] LID - e244812 AB - Follicular dendritic cells are antigen-presenting immune accessory cells of mesenchymal origin. Follicular dendritic cell sarcomas (FDCS) typically occur in nodal and extranodal sites. However, presentation in the extremity has rarely been reported. A woman in her 60s had a painless, slow-growing right posterior thigh swelling, which had been present for 9 months. Imaging revealed a subcutaneous lesion in the posterior aspect of the right mid-thigh. Fine-needle aspiration cytology from the lesion was suggestive of a malignant spindle cell neoplasm, and she underwent its wide local excision. Immunohistochemistry showed expression of epithelial membrane antigen and CD35, but an absence of cytokeratin, desmin, CD23 and S100. The Ki-67 index was low and a diagnosis of FDCS was made. The lack of clinical guidelines was a challenge in the treatment of this rare case. A multidisciplinary board discussion played a critical role in the planning of the patient's adjuvant treatment. CI - (c) BMJ Publishing Group Limited 2022. No commercial re-use. See rights and permissions. Published by BMJ. FAU - Rajan, Rajasree AU - Rajan R AD - Radiation Oncology, Amrita Institute of Medical Sciences and Research Centre, Cochin, Kerala, India. FAU - Roshni, Divya Gireesan AU - Roshni DG AD - Radiation Oncology, Amrita Institute of Medical Sciences and Research Centre, Cochin, Kerala, India. FAU - Mathew, Suzann Mary AU - Mathew SM AD - Pathology, Amrita Institute of Medical Sciences, Cochin, Kerala, India. FAU - Jojo, Annie AU - Jojo A AD - Pathology, Amrita Institute of Medical Sciences, Cochin, Kerala, India dr.anniejojo@ymail.com. FAU - Nair, Haridas Mohanachandran AU - Nair HM AD - Radiation Oncology, Amrita Institute of Medical Sciences and Research Centre, Cochin, Kerala, India. FAU - Kottarathil, Vijayakumar Dehannathparambil AU - Kottarathil VD AD - Surgical Oncology, Amrita Institute of Medical Sciences, Cochin, Kerala, India. LA - eng PT - Case Reports PT - Journal Article DEP - 20220426 PL - England TA - BMJ Case Rep JT - BMJ case reports JID - 101526291 SB - IM MH - Biopsy, Fine-Needle MH - *Dendritic Cell Sarcoma, Follicular/diagnosis/surgery MH - Female MH - Humans MH - Immunohistochemistry MH - *Sarcoma MH - Thigh/pathology PMC - PMC9045049 OTO - NOTNLM OT - Oncology OT - Pathology OT - Radiotherapy OT - Surgery COIS- Competing interests: None declared. EDAT- 2022/04/28 06:00 MHDA- 2022/04/29 06:00 PMCR- 2024/04/25 CRDT- 2022/04/27 05:21 PHST- 2022/04/27 05:21 [entrez] PHST- 2022/04/28 06:00 [pubmed] PHST- 2022/04/29 06:00 [medline] PHST- 2024/04/25 00:00 [pmc-release] AID - 15/4/e244812 [pii] AID - bcr-2021-244812 [pii] AID - 10.1136/bcr-2021-244812 [doi] PST - epublish SO - BMJ Case Rep. 2022 Apr 26;15(4):e244812. doi: 10.1136/bcr-2021-244812.