Isidor Neumann

Isidor Neumann, Edler von Heilwart (2 March 1832, Mißlitz, Moravia – 31 August 1906) was an Austrian dermatologist.

He was a student at the so-called Vienna School of Dermatology under Ferdinand Ritter von Hebra (1816–1880), earning his doctorate in 1858. In 1863 he received his habilitation, and in 1873 became an associate professor. In 1881 he was appointed professor of dermatology and successor to Carl Ludwig Sigmund (1810–1883) as director of the clinic for syphilis.

In an 1886 publication of Vierteljahrsschrift für Dermatologie und Syphilis, he described a type of pemphigus vulgaris, which later became known as Pemphigus vegetans of Neumann. He was also the first to publish a detailed study (Über die senilen Veränderungen der Haut des Menschen) of prematurely aged skin caused by over-exposure to weather conditions. However it wasn't until several years later that Paul Gerson Unna (1850-1929) gave it a name, calling it seemannshaut or "sailors' skin".

During the Austrian government's occupation of Bosnia-Herzegovina, Neumann was sent to the country to manage the public health problem of syphilis and leprosy.