The phrase "human tumors" refers to abnormal growths or lumps that can develop in the human body. These growths can be cancerous or non-cancerous and may cause health problems. Full definition
Initially, the Geneva researchers observed the vascularisation processes of human tumour cells from different cell lines. (sciencedaily.com)
The study, which is published in the journal Nature Communications, was conducted on human tumour cells and on mice, and offers hope of a much improved therapy for a severe form of cancer. (sciencedaily.com)
Cell lines from human tumours did exist, but were considered unsafe: what if cancerous cells were transferred along with the vaccine? (newscientist.com)