IntroductionCurvularia hawaiiensis(formerlyBipolaris hawaiiensis) is a plant pathogen often isolated from soil and vegetative material. However, only a few cases of opportunistic invasive infections in humans have been described.CaseA 16-year-old female patient without comorbidities was admitted to the emergency department because of fever and chest pain. We described the first coinfection ofCurvularia hawaiiensisandMycobacterium tuberculosisnecrotising pneumonia.DiscussionMultiple infections can alter immune responses. However, immunosuppression is the most critical risk factor for infection with species of the genusCurvularia. Therefore, it is crucial to carefully examine patients with tuberculosis, as they may rarely be coinfected with unusual fungi.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12941-023-00593-z.