Lymphadenopathy or adenopathy is a disease of the lymph nodes, in which they are abnormal in size or consistency. Lymphadenopathy of an inflammatory type (the most common type) is lymphadenitis, producing swollen or enlarged lymph nodes. [Source: Wikipedia ]

Hilar lymphadenopathy
Metastatic lymphadenopathy
May Cause
Abnormal position of stomach
Anterior indentation on rectosigmoid junction
Anterior vertebral scalloping
Axillary mass
Bronchial lesion
Calcified mediastinal mass
Displacement of the thoracic paraspinal line
Extrahepatic portal vein obstruction
Extrinsic deformity of gallbladder
Increased presacral space
Increased prevertebral space in an adult
Increased prevertebral space in infants or children
Increased retrogastric or retroduodenal space
Inferior vena cava obstruction
Infratemporal fossa lesion
Juxtadiaphragmatic lesions in children
Large pelvic soft-tissue mass
Main pulmonary artery obstruction
Mass displacing kidney
Mass in the porta hepatis
Middle mediastinal lesion
Mural ureteral filling defect
Nasopharyngeal lesion
Parapharyngeal space lesion
Paraspinal soft-tissue mass
Periportal edema
Portal vein obstruction
Posterior mediastinal lesion
Pulmonary artery obstruction
Renal ischemia
Retrocardiac lesion
Retrosternal mass
Soft-tissue mediastinal mass
Soft-tissue neck mass
Solid mass in carotid sheath
Solid mesenteric lesion
Solitary thoracic calcification
Splenic vein obstruction
Subglottic tracheal narrowing
Submandibular space lesion
Superior mediastinal mass
Superior mesenteric artery syndrome
Superior vena cava syndrome
Tracheal displacement
Unilateral pulmonary arterial hypervascularity
Wide superior mediastinum in an infant or child
May Be Caused by
Bacillary angiomatosis
Castleman disease
Crohn disease
Metastatic carcinoma
Omenn syndrome
Sézary syndrome