Abstract
A tumor cell line was derived and established from a bone marrow aspirate of a 41-year-old male who presented with motor symptoms of cord compression and an epidural tumor with osseous, pulmonary and hepatic metastases. The epidural tumor was an epithelioid sarcoma staining positive for cytokeratin markers of epithelial differentiation AE-1 and AE-3. This cell line was composed of lowly refractile, multinucleated giant or mononuclear round or elongated cells with monopolar or bipolar short processes. When permitted to grow beyond confluence these cells clumped up and formed mounds progressing to free floating spheroids. The cells were characterized by chromosomal triploidy with marker chromosomes, rapid growth in nude mice and secretion of immunoreactive and biologically functional granulocyte macrophage colony stimulating factor. This epithelioid sarcoma cell line stained positive for AE-1, AE-3, vimentin, epithelial membrane antigen and was designated VA-ES-BJ.
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