German pathologists

Johann Carl Kaiserling (3 February 1869 - 20 August 1942) was a German pathologist who was a native of Kassel-Wehlheiden.
He studied medicine in Munich, Kiel and Berlin, earning his medical doctorate in 1893. In 1902, he became privatdozent at the University of Berlin, and from 1912 was a professor of general pathology and pathological anatomy at the University of Königsberg.His name is associated with "Kaiserling's fixative", a means of preserving histologic and pathologic specimens without changing the natural color. This fixative is an aqueous solution of formalin, potassium nitrate and potassium acetate. Kaiserling is also known for his pioneer work in the field of photomicrography.

Gustav Hauser (13 July 1856 in Nördlingen – 30 June 1935 in Erlangen) was a German pathologist and bacteriologist.
He studied medicine at the Universities of Munich and Erlangen, where he worked as an assistant in the gynecological clinic under Paul Zweifel and at the pathological institute of Friedrich Albert von Zenker. In 1883 he obtained his habilitation for pathological anatomy and bacteriology, and in 1895 became a full professor and director of the institute of pathology in Erlangen.In 1885, Hauser was the first to isolate the bacillus Proteus vulgaris. He is also credited with developing a formalin for the preservation of bacterial cultures.In Erlangen, the thoroughfare Gustav-Hauser-Straße is named in his honor.

David Paul von Hansemann (5 September 1858 – 1920) was a German pathologist born in Eupen, east Belgium. He is remembered for his work in the field of oncology, in particular, his concept pertaining to anaplasia of cancer cells.
He studied medicine at the Universities of Berlin, Kiel and Leipzig, and following graduation spent nine years as an assistant to Rudolf Virchow (1821-1902) in Berlin. In 1890 he became habilitated in pathological anatomy, and in 1897 obtained the title of professor. In 1907 he began work as a prosector at Friedrichshain city hospital. During World War I he served as an army pathologist.
His name is associated with "Hansemann macrophages" (also known as "Hansemann cells"), which are large mononuclear cells containing Michaelis-Gutmann bodies that affect the urinary tract or kidney.

Edgar Goldschmid (born 14 December 1881 in Frankfurt, died 26 May 1957 in Lausanne) was a German physician, pathologist and historian of medicine.

Karl Theodor Fahr (German pronunciation: [kaʁl ˈteːodoːɐ̯ ˈfaːɐ̯]; 3 October 1877 – 29 October 1945) was a German pathologist born in Pirmasens of the Rhineland-Palatinate.
In 1903 he earned his medical doctorate from the University of Giessen, afterwards continuing his studies with Eugen Bostroem (1850-1926) in Giessen, under Morris Simmonds (1855-1925) in Hamburg and with Ilya Ilyich Metchnikoff (1845-1916) in Paris. In 1924, he became director of the pathological institute at the University Medical Center Hamburg-Eppendorf.
Fahr is remembered for his work in nephrology and research of kidney disorders. With internist Franz Volhard (1872-1950) he published a comprehensive monograph on Bright's disease titled Die Brightsche Nierenkrankheit. In 1923, he provided an early correlation between lung cancer (Bronchialkarzinom) and tobacco smoking. Today his name is associated with Fahr's disease, which is a degenerative neurological disorder characterized by calcifications and cell loss within the basal ganglia. Fahr was however not the first describe the disease and there are suggestions that the eponym be avoided.In 1933 Fahr signed the Vow of allegiance of the Professors of the German Universities and High-Schools to Adolf Hitler and the National Socialistic State. He committed suicide in 1945.

Hans Gerhard Creutzfeldt (June 2, 1885 – December 30, 1964) was a German neurologist and neuropathologist. Although he is typically credited as the physician to first describe the Creutzfeldt–Jakob disease, this has been disputed. He was born in Harburg an der Elbe and died in Munich.

Hermann Beitzke (21 June 1875 – 8 June 1953) was a German pathologist born in Tecklenburg, Westphalia.
Beitzke studied medicine at several universities, earning his doctorate in 1899 from the University of Kiel. In 1900-01 he was an assistant at the institute of hygiene in Halle an der Saale, and afterwards worked at the pathology institutes in Göttingen and Berlin. In 1911 he became a professor at the University of Lausanne, and in 1922 relocated to the University of Graz, where he taught classes until 1941.
He specialized in pathological investigations of infectious diseases, in particular tuberculosis studies. He was co-editor of Ergebnisse der gesamten Tuberkuloseforschung, a journal involving tuberculosis research.

Theodor Langhans (28 September 1839 – 22 October 1915) was a German pathologist who was a native of Usingen, Duchy of Nassau.
He studied medicine at the University of Heidelberg, and at the University of Göttingen under Friedrich Gustav Jakob Henle (1809–1885), at Berlin under Rudolf Virchow (1821–1902) and in Würzburg, where he became an assistant to Friedrich Daniel von Recklinghausen (1833–1910). In 1867 he became a lecturer at the University of Marburg, and in 1872 became a full professor of pathology at the University of Giessen, where he succeeded Ludwig Franz Alexander Winther (1812–1871).
From 1872 until 1912, Langhans was a professor of pathological anatomy at the University of Bern, where one of his assistants was surgeon Fritz de Quervain (1868–1940). He also worked with Serafina Schachova on kidney anatomy research using a canine model of induced nephritis.Langhans is remembered for his discovery of multi-nucleated giant cells that are found in granulomatous conditions, and are now referred to as Langhans giant cells.

Karl Albert Ludwig Aschoff (10 January 1866 – 24 June 1942) was a German physician and pathologist. He is considered to be one of the most influential pathologists of the early 20th century and is regarded as the most important German pathologist after Rudolf Virchow.