NCIt definition : A malignant epithelial neoplasm characterized by the presence of spindle cells and
anaplastic morphologic features. Giant cells and a sarcomatous component may also
be present.;
Alternative definition : CDISC: A malignant epithelial neoplasm characterized by the presence of spindle cells.; NCI-GLOSS: A type of cancer that begins in the skin or in tissues that line or cover
internal organs and that contains long spindle-shaped cells.;