uncommon and include functioning paragangliomas (pheochromocytomas) and nonsecreting chemodectomas.(1)Of all of the neurogenic mediastinal tumors, 40-65% originate from the peripheral nerve sheath. Schwannomas (neurilemmomas) and neurofibromas, both benign lesions, account for over 95% of the tumors in this group. Malignant peripheral nerve sheath tumors (malignant schwannomas) are extremely aggressive and account for the remaining 2-4%. Case reportA 61-year-old male patient sought treatment in the emergency room of our institution reporting subscapular pain for two months. The IntroductionNeurogenic tumors are the most common mediastinal tumors, accounting for 20-35% of all of the mediastinal neoplasms.(1,2) Neurogenic tumors are also responsible for approximately 75% of all lesions in the posterior mediastinum, although they are typically benign and asymptomatic. When symptoms are present, they should raise the suspicion of a malignant lesion. AbstractMalignant neurogenic mediastinal tumors in adults are uncommon and extremely aggressive. We report the case of a 61-year-old male patient with the simultaneous occurrence of malignant mediastinal schwannoma and bronchioloalveolar carcinoma. Although bronchioloalveolar carcinoma is present in 4-7% of the resected synchronous thoracic tumors, this association has never been reported in the literature. However, it is a common finding in patients presenting apparently inflammatory infiltrates and ground-glass opacities, as in the case presented here.