Lost lung cancer C34.9

The chemical weapon “Lost” was developed by the German chemists Wilhelm Lommel and Wilhelm Steinkopf during World War I and named after them (Antwerpes 2025).

The term “lost lung cancer” refers to a malignant disease of the lungs caused by the chemical warfare agent mustard gas (Herold 2025).

Lost lung cancer is caused by exposure to dichlorodiethyl sulfide, for example in the form of mustard gas (Herold 2025), a chemical weapon first used by Germany during World War I (Antwerpes 2025).

The disease is classified as an occupational disease (Konietzko 1995).

Since the 1925 Geneva Convention and the 1989 Paris Conference, chemical warfare agents and other chemical agents have been banned, but they continue to be produced (Bey 2003).

1. Antwerpes F et al. (2025) Lost. Doc Check Flexikon https://flexikon.doccheck.com/de/Lost
2. Bey T A, Walter F G (2003) Mustard gas, nitrogen mustard, lewisite, and phosgene oxime: Skin-damaging military chemical agents and their significance for emergency medical services, fire departments, police, and the military. Emergency and Rescue Medicine. https://www.springermedizin.de/senfgas-stickstofflost-lewisit-und-phosgenoxim/8707136
3. Herold G et al. (2025) Internal Medicine. Herold Verlag 401
4. Kasper D L, Fauci A S, Hauser S L, Longo D L, Jameson J L, Loscalzo J et al. (2015) Harrison’s Principles of Internal Medicine. McGraw-Hill Education
5. Konietzko et al. (1995) List of occupational diseases with pulmonary manifestations, sorted by diagnosis. The Lung Online https://www.mevis-research.de/~hhj/Lunge/Mappe/LuBerKrh.html