<prompt> Golden S is seen inLeft upper lobe collapsePleural EffusionLeft lower lobe collapseBronchogenic carcinoma  <response>: Golden S sign is a Reverse S sign seen on Frontal Chest Radiograph In patients with Bronchogenic Ca with Right Upper lobe collapse Lower convexity of the Reverse S is due to the mass Upper concavity of the S is due to Right UPPER LOBE atelectasis with the upward shifting of the horizontal fissure. 