Abstract
The cytologic characteristics of 133 nonepithe ilal tumors were analysed for the cytologic diag nosis. While the nonepithelial tumors were class fied into five groups, fibroangiogenic, osteogenic, myogenic, lipogenic, and neurogenic groups, the cell component generally consisted of the two types of cells; the fibrous mesenchymal cells and differentiated cells specified to every tumor group. The most common feature of the cellular morpho logy was observed in the nuclear characteristics such as thinsmooth nuclear membrane and fine granular chromatins and less frequently abnormal indentation of nuclear membrane and round hunge nucleolus. Cells were freely separated in the most cases, whereas the epitheloid arrangement was also observed in some of the myogenic and neurogenic tumors.
The differences of cytogenetic and clinicopatho logic bases for the diagnosis between epithelial and nonepithelial tumors were discussed.
