Origin: Anc Greek
δια-/dia(=prefix meaning through, apart) > probably from the root δις/dis(=twice)
πήδημα/pedema(=leap) > πηδός/pedos(=The flat part of an oar)
literally meaning “ act of leaping through”
In 1889 by German-Jewish pathologist Julius Friedrich Cohnheim (1839 –1884) was and later by Clarke (1935).
Diapedesis is defined the migration of blood cells through intact capillary walls into soft tissues.