[Alveolar hemorrhage and cocaine use].

In France, cocaine is the second most commonly illicit drug used after cannabis. Cocaine, mainly smoked in the form of crack, can be responsible for a wide range of respiratory disorders. The aim of this systematic literature review was to clarify what is known about the link between cocaine use and alveolar hemorrhage. We performed a Medline search covering the period 1980-2016 and collected data from 84 articles. The number of acute forms described in the literature is small but postmortem studies show that hidden forms are frequent. The diagnosis is based on the association of hemoptysis, anemia and diffuse alveolar opacity. Bronchoalveolar lavage shows hemosiderin-laden macrophages. Of the 13 cases identified, 12 patients had hemoptysis, anemia and diffuse alveolar infiltration on pulmonary or chest CT. In 9 cases, the presence of hemosiderin-laden macrophages was identified in bronchoalveolar lavage or pulmonary biopsy. Except for 2 deaths, the outcome was favorable when cocaine use was stopped. Systematic interventions to help people stopping using this psychoactive substance will protect lung health.