liver cancer calcifying nested epithelial stromal tumor of the liver A rare malignant tumor that arises from the liver and occurs in children. It is characterized by the presence of nested epithelioid and spindle cells. Desmoplasia, calcifications, and bone formation may also be present. ICDO:8975/1 NCIT:C96830 MONDO:0006122 UMLS:C3472610 GARD:0027741 MEDGEN:758637 EFO:1000149