Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top - normal . Intrathoracic lymph node enlargement in subtle interstitial lung abnormalities are consistent with patient 's known sarcoidosis . There is new increased diffuse opacity overlying the left lung , with tenting of the diaphragm , consistent with left upper lobe collapse . On the lateral view , there is an opacity anteriorly , with anterior displacement of the oblique fissure , also consistent with left upper lobe collapse . There is no large pleural effusion , or pneumothorax .
    OUTPUT:
    
1 . New left upper lobe collapse . This could be secondary to acute airway obstruction due to mucous plugging , clotted blood products , foreign body aspiration , or granulation tissue if the patient has sustained bronchial injury . A chest CT or bronchoscopy is recommended for further evaluation . 2 . Intrathoracic lymph node enlargement and subtle interstitial lung abnormalities , consistent patient 's known sarcoidosis .