Cytological, Immunocytochemical, and Molecular Findings of Extraskeletal Round Cell Sarcomas in Paediatric Patients

Round cell sarcomas share many morphological similarities, so the differential diagnosis can be broad; however, subtle differences between tumours can aid the final diagnosis. Nevertheless, most round cell sarcomas require molecular studies for accurate classification, and cytological specimens are usually high-quality material for such ancillary techniques.