Myasthenia Gravis-Like Syndrome Presenting as a Component of the Paraneoplastic Syndrome of Lung Adenocarcinoma in a Nonsmoker

Figure 2

CT angiogram chest showing a large right mediastinal mass (8.8 × 6.2 × 9.6 cm), consistent with malignancy involving the right cardiac atrium with occlusion of the right main pulmonary artery which is either compressed or invaded by the mass, and nonopacification of right pulmonary arteries. No left pulmonary embolus is seen. Metastatic adenopathy in the mediastinum and probably right hilum. There are enlarged mediastinal lymph nodes, measuring up to 2.6 × 2.2 cm in the precarinal region and 2.2 × 1.9 cm in the anterior superior mediastinum.