German dermatologists

Ludwig Halberstädter (9 December 1876, in Beuthen, Oberschlesien – 20 August 1949) was a German-Jewish radiologist.
In 1901 he obtained his medical doctorate from the University of Breslau, and following graduation became an assistant to surgeon Carl Garré (1857–1928) at the University of Königsberg. Afterwards he returned to Breslau as an assistant to dermatologist Albert Neisser (1855–1916), under whose direction he participated on a medical research mission to Java (1907).
In 1922 he obtained his habilitation for dermatology and radiation therapy in Berlin. Here he became director of the radiation department at the Instituts für Krebsforschung (Institute for Cancer Research), Berlin-Dahlem. In this capacity he used thorium as a treatment for cancer. In 1933 he emigrated from Nazi Germany to Palestine, where he became director of radiation therapy at the Hadassah Hospital in Jerusalem. He died in New York City on August 20, 1949.
In 1905 he introduced radiation for ablation of the ovaries.

Albert Friedrich Veiel (8 June 1806 – 2 August 1874) was a German dermatologist who was a native of Ludwigsburg.
He studied at the Universities of Tübingen and Paris, and in 1829 earned his medical doctorate. In 1837 at Cannstatt, he founded the first in-patient dermatological clinic in Germany. The clinic was called the Heilanstalt für Flechtenkranke, and with orthopedist Jakob Heine (1800–1879) and others, Veiel was a catalyst in making Cannstatt an important center for medical treatment. The clinic attracted numerous celebrities and members of European aristocracy.

Hermann Werner Siemens (August 20, 1891 (Charlottenberg) -1969) was a German dermatologist who first described multiple skin diseases and was one of the inventors of the twin study. Siemens' work in twin studies is influential in modern genetics and is used to address the environmental and genetic impacts upon traits. Siemens was involved in racial hygiene and affiliated with the Nazi Party.

Max Marcuse (April 14, 1877, Berlin – June 24, 1963, Tel Aviv) was a German dermatologist and sexologist. He became an editor for Magnus Hirschfeld’s Journal of Sexology in 1919 and continued editing the journal until 1932. Marcuse immigrated to Palestine in 1933, following the Nazi rise to power. Several of Marcuse's unpublished writings are being preserved at the Kinsey Institute.

Johannes Fabry (1 June 1860, in Jülich – 29 June 1930, in Dortmund) was a German dermatologist.
He studied medicine at the universities of Bern and Berlin, receiving his doctorate in 1886. Following graduation he trained in dermatology under Joseph Doutrelepont at the University of Bonn and with Hugo Ribbert in Zürich. From 1889 to 1929 he was chief medical officer of the Skin Clinic at the Dortmund municipal hospital, which under his guidance, became a leading center for dermatology.His name is associated with "Fabry disease", a rare, inherited metabolic disease characterized by telangiectatic skin lesions, kidney failure and disorders of the cardiovascular, gastrointestinal, and central nervous systems. In 1898 he described dermatological features of the disease in a 13-year-old boy, naming the condition "purpura haemorrhagica nodularis". The disease is also called "Anderson-Fabry disease", named along with British surgeon William Anderson, who independent of Fabry, reviewed the progression of the disease over nearly 20 years in a 39-year-old patient.