Superficial to the gland is the sternum. Lying deep to the thymus are the great vessels and the cranial part of the pericardium. The two lobes of the gland differ in size, and in many individuals the right lobe overlaps the left lobe. The thymus is about 5 cm long, 4 cm wide, and 6 mm thick.
Signs and Symptoms of Emphysema Symptoms of emphysema vary from mild to severe and include shortness of breath (dyspnea), cough, and difficulty breathing upon exertion (e.g., exercise). Emphysema is a chronic (long lasting), progressive condition, which means the symptoms usually worsen over time.
Causes, Symptoms, Diagnosis, Treatment and Prevention of Emphysema. Smoking is the #1 Cause of Emphysema. Chronic Obstructive Pulmonary Disease (COPD) Emphysema is a common type of COPD in which the alveoli, or air sacs of the lungs, become damaged causing them to enlarge and burst.