Markers aiding the diagnosis of chondroid tumors: an immunohistochemical study including osteonectin, bcl‐2, cox‐2, actin, calponin, D2‐40 (podoplanin), mdm‐2, CD117 (c‐kit), and YKL‐40
APMIS. Acta pathologica, microbiologica et immunologica Scandinavica./APMIS