抄録
We report the cytologic features of chondroblastoma of the right patella in a 15-year-old boy. Imprint cytology specimen, prepared from frozen sections, contained many mononuclear cells and multinucleated giant cells. Mononuclear cells had round to ovoid shaped bland nuclei with fine chromatin and inconspicuous nucleolus. The characteristic features of these cells were irregular indentation of nuclei, nuclear grooves, and only a few intranucicar pseudoinelusions. Mitoses were absent. Chondroid matrix could not be identified in cytologic specimen, but these nuclear findings were considered to be highly suggestive of chondroblastoma.
