Sarcoma with BCOR genetic alterations. a Hypercellular smears with cohesive cell sheets of round and spindled cells, dispersed cells, and papillary clusters with vascular cores (MGG stain). b, c Nuclear pleomorphism, double-cell population, large light cells and small dark cells, and eosinophilic connective tissue in the background are common findings (d) as is admixture of spindle cells (MGG and H&E stains).