Radiological imaging of mediastinal masses.

Dr/ ABD ALLAH NAZEER. MD.

Common mediastinal lesions.

Anterior mediastinal masses(50%).The anterior mediastinal masses usually displaced the anterior junctional line, obliterate the cardiophrenic angle and the retro-sternal space with hilum overlay sign.1- Retro-sternal goiter. 2- Tortuous innominate artery.3- Fat deposition. 4- Enlarged lymph nodes.5- Ascending aortic aneurysm.6- Thymoma.7- Germ cell tumour.8- Pleuro-pericardial cyst.9- Morgagni hernia.10- Para-thyroid adenoma.

Anterior mediastinal Lymphoma.

Morgagni hernia.

Thymic carcinoma.

Neck computed tomography shows rightward tracheal deviation (wide arrow) and tortuous innominate artery (narrow arrow) contact with trachea at right supra-clavicular area beneath subcutaneous layer (A), and at thoracic inlet level (B).

Enhancing 1.3-cm nodule in the right tracheoesophageal groove, with modest contrast washout representing a right inferior parathyroid gland in an orthotopic location. Pathology demonstrated a 3-g parathyroid adenoma.

Middle mediastinal masses(25%). The middle mediastinal masses widened the para-tracheal stripes, displaced the azygo-oesophageal recess on right side.

1- Lymph nodes enlargement.2- Aortic arch aneurysm.3- Enlarged pulmonary artery.4- Dilated superior vena cava.5- Bronchogenic cyst.6- Tracheal lesions.7- Cardiac tumours.

Bronchogenic cyst.

Aneurismal dilatation of the main pulmonary artery and the right pulmonary artery with peripheral pruning due to PH

Posterior mediastinal masses(25%).1- Neurogenic tumours.2- Pharyngio-esophygeal pouch.3- Descending thoracic aortic aneurysm.4- Hiatus hernia.5- Esophageal lesions.6- Para-vertebral masses.7- Neuroenteric cysts.8- Bochdalek hernia.9- Pancreatic pseudocyst.10- Abscess.11- Fibrosis.12- Extra-medullary hematopoiesis.13- Lateral meningocele.

Posterior mediastinal schwannoma.

Schwannoma.

Esophageal lipoma and its fibrovascular stalk.

Bochdalek's hernia.

Descending thoracic aortic aneurysm.

Posterior mediastinal mass with para-vertebral abscess.

Neuroenteric cyst.

Lateral meningocele.

Thank You.