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  • Title: Cytomorphologic panorama of giant cell tumour of tendon sheath.
    Author: Suneja P, Diwaker P, Ranjan K.
    Journal: Diagn Cytopathol; 2023 Dec; 51(12):772-778. PubMed ID: 37649447.
    Abstract:
    BACKGROUND: Giant Cell Tumour of Tendon Sheath (GCTTS) is a slow growing benign soft tissue tumour arising from synovium of tendon sheath or joint. These tumours occur more frequently in upper limbs, especially hands. In the present study, we aimed to evaluate the cytomorphological spectrum of GCTTS. METHODS: This retrospective study includes a total of 56 cases of GCTTS diagnosed over a period of 8 years. The clinical and radiological details of these cases were retrieved from the cytopathology records and detailed cytomorphological features were studied and analysed. Histopathological correlation was done in 16/56 cases, where follow-up was available. RESULTS: The mean age of patients at the time of presentation was 32 years and were predominantly females (68%). The most common site of GCTTS was fingers (76%), followed by foot, wrist and toes. The most consistent finding on cytology was stromal cells (100%) of polygonal, spindle and plasmacytoid morphology with interspersed multinucleated osteoclastic giant cells (100%), followed by binucleated stromal cells (75%), xanthoma cells (61%) and hemosiderin laden macrophages (52%). Presence of proteinaceous fluid background was also observed in 50% of the cases. CONCLUSION: GCTTS can be diagnosed with certainty on FNAC based on characteristic cytomorphological features in an appropriate clinical and radiological setting. FNAC plays a pivotal role in diagnosing GCTTS and differentiating it from other giant cell rich lesions, thus obviating the need of tissue biopsy for diagnosis, which in turn helps the clinician in timely and adequate management of the patient.
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