There are<unk>  tests that are helpful for diagnosis the underlying cause of<unk> . Sputum must be evaluated for the cytology, gram stain, culture, and acid-fast stain. Arterial blood gases might show hypoxia. Complete blood count (CBC) might show elevated WBC, low platelet, and anemia. Signs of dehydration might be detected in<unk>  tests such as BUN, Cr, urinalysis, or electrolytes. Coagulation studies might be abnormal.
Hemoptysis laboratory findings
Hemoptysis physical examination
Lung mass physical examination
Pleural effusion physical examination
Emphysema physical examination
Pulmonary nodule other imaging studies
Lung mass laboratory findings
Pleural effusion laboratory findings