<s>[INST] context: Chest X-ray with pleural effusion Obliteration of CP angle Distinct border Concave upward curve called ELLIS CURVE 150-200 ml on PA view > 5 ml lateral view 15-20 ml on lateral decubitus view Right Pleural Effusion Pneumothorax: ON CXR: - Absent bronchoalveolar markings - Visceral pleural reflection - Deep sulcus sign in supine patient - Best view: expiratory view - IOC: CT USG of pneumothorax: - Hypoechoic pleural line - SEASHORE sign present in Normal lung Absent = pneumothorax: M mode USG: BARCODE/ STRATOSPHERE sign Tension pneumothorax: Pneumothorax with mediastinal shift Tension pneumothorax: Pneumothorax with mediastinal shift - Absent bronchoalveolar markings - Visceral pleural reflection - Lung Collapses towards hilum FALLEN LUNG sign: Fracture of bronchus - Lungs fall down inferiorly and laterally - If point supine - fall posteriorly Hydropneumothorax: Horizontal Air Fluid Levels CONSOLIDATION: Opacity not obscuring CP Angle Ill-defined fluffy borders No mediastinal shift Consolidation of Right Middle Lobe: SILHOUETTING of Right Hea Border. SILHOUETTING of Left Hea Border: Lingular Pathology [/INST] question: A patient presented with complaints with dyspnoea. The shown X- ray is suggestive of:- | options: A: Consolidation B: Exudative pleural effusion C: Pneumothorax D: Hydropneumothorax | answer: B </s>