LUNG MASSES OF SURPRISING ETIOLOGIES MIMICKING MALIGNANCY

TYPE: Case Report TOPIC: Lung Pathology INTRODUCTION: masses may pose a difficult differential diagnosis. The malignant etiology is the most feared. CASE PRESENTATION: 1: 51-y-old female, complainig of persistent cough with several months evolution, which led to performance chest x-ray that revealed an opacity in right upper lobe (RUL). Chest computed tomography (CT) showed round and homogeneous mass RUL (48x50mm), discreet enhancement after contrast administration. patient was submitted surgical ressection reffered lesion histopathological examination Schwannoma. 2: 55-y-old man, smoker, admitted emergency room for hemoptysis. left para-hilar mass; CT solid, irregular (83x37mm), connecting hilum. increased uptake on PET-CT. Transthoracic biopsy bronchoscopy were performed, inconclusive. As tumor could not be definitively ruled out, lobectomy alterations suggestive organizing pneumonia, as well presence foreign-body. DISCUSSION: Schwannomas are benign, typically slow-growing often discovered incidentally. Organizing pneumonia consists granulation tissue chronic inflammatory cell infiltrate. In described cases, given high suspicion malignancy, it decided remove lesions surgically diagnosis obtained post-operatively. CONCLUSIONS: It important raise awareness pathologies can mimic lung cancer, know its main characteristics, order narrow initiate appropriate treatment. DISCLOSURE: Nothing declare. KEYWORD: Schwannoma; pneumonia.