Adolph Hannover (24 November 1814 - 7 July 1894) was a Danish pathologist who in 1843 carried out the first definitive microscopic description of a cancer cell. Hannover is said to have introduced the microscope to Denmark, but his work had widespread influence; his book Om Mikroskopets Bygning og dets Brug (1847) was translated into English and several other languages.