We report a case of thoracic sclerosing haemangioma with concomitant pulmonary and mediastinal involvement in a 19-year-old girl who presented with haemoptysis and dyspnoea. CT showed a large oval mass in the left lower lobe and another larger dumbbell-shaped mass in the posterior mediastinum. Both masses were well-defined and harboured punctate calcifications. They exhibited inhomogeneous contrast enhancement and contained some cystic areas. In addition, an air meniscus sign was present around the pulmonary lesion.