Single-cell suspensions derived from freshly dispersed human ovarian carcinomas separate into three clearly isolatable fractions, according to their expression of CD45 (leukocyte) and VE-cadherin (endothelial) markers: bona fide leukocytes (CD45+VE-cadherin−; mostly lymphocytes according to their FSC vs SSC profile), bona fide endothelial cells (CD45−VE-cadherin+) and, VLCs (CD45+VE-cadherin+). The gene discussed is PTPRC; the disease is ovarian carcinoma.