Walter Freudenthal (6 May 1893 – 27 March 1952) was a German-Jewish dermatologist who gave the earliest clear histopathological description of keratoma senile (actinic keratosis) in 1926 in Breslau.
In 1933, he moved to London to escape the Nazi regime and worked as a dermatopathologist at University College Hospital (UCH) in London where he coined the term keratoacanthoma in the 1940s.
He worked with dermatologist Geoffrey Dowling on the connection between dermatomyositis and scleroderma and was later appointed to the first readership in dermatological histology by London University.
In addition to lecturing, demonstrating specimens at the Royal Society of Medicine and postgraduate training, Freudenthal wrote many papers on his histopathological findings, and chapters in dermatology textbooks.