Hayflick demonstrated for the first time that mortal (normal) and immortal (malignant) mammalian cells existed.

The other kind of immortal cell is the all-purpose, embryonic stem cells from which the whole organism develops.

Oncogenic ras can transform most immortal cells to a tumorigenic state.

They are of immense interest because they form a pool of immortal cells that develop when needed into red or white blood cells.

Most cancers are the result of "immortal" cells that have ways of evading this programmed destruction.

They became the first immortal human cells ever grown in a laboratory.

Her immortal cells will continue to help mankind forever.

But those immortal cells have damaged chromosomes, which can become cancerous.

Typically, the only immortal human cells are our germline and most cancers.

Those immortal cells soon became the workhorse of laboratories everywhere.