Fig. 1

63-year-old male patient presenting with massive weight loss, cachexia and hoarseness of voice. Axial T1 (A), axial T2 (B), axial STIR (C) and coronal T2 STIR (D) weighted MR images show large right upper lobar soft tissue mass lesion measuring 6 × 9.9x10.8 cm along its maximum axial and craniocaudal dimensions respectively. It elicits isointense signal and hyperintense signal relative to the surrounding muscles on T1 and T2. It shows right hilar and mediastinal extensions encroaching on the lumen of the trachea and right main bronchus with obstruction of the upper lobar bronchus causing subsequent partial collapse of the right upper lobe. It is seen abutting the SVC. DWI (E) and ADC map (F) images show restricted diffusion with LSR = 1.73, ADC mean 0.63 and ADC min 0.46. Histopathology revealed small cell lung cancer