Select a Community
Are you sure you want to trigger topic in your Anconeus AI algorithm?
Select Answer to see Preferred Response
The thymus gland (labeled in A) is visible on a chest radiograph in infants and will change in response to illness due to its immunologic role.The thymus gland is the site of T-cell maturation. The thymus is visible on a chest radiograph in infants and continues to grow throughout childhood. It is located in the anterior part of the superior mediastinum. On a chest radiograph, the thymus may appear as a “widened mediastinum,” continuous with the superior border of the heart (Figure A) or as a triangular-shaped opacity known as the thymic “sail sign," located towards the right of the mediastinum. At puberty, the gland will decrease in size and eventually be replaced by fatty tissue. Askin and Young review the evidence regarding the history and function of the thymus. They discuss how this structure is involved in immune function. They recommend monitoring for the absence of this structure in immunodeficient patients.Figure A shows a normal chest radiograph of an infant with a normal cardiothymic contour.Incorrect Answers:Answer 2: B points to the trachea. Deviation of this structure can be seen in patients with tension pneumothorax. Treatment is with needle thoracostomy followed by chest tube placement.Answer 3: C points to the apex of the heart. This structure can be enlarged in congenital heart conditions. Treatment is with surgical correction of these conditions.Answer 4: D points to the stomach. This structure can be abnormal in patients with pyloric stenosis. Treatment is with pyloromyotomy.Answer 5: E points to the diaphragm. This structure can be abnormal in patients with diaphragmatic hernias. Treatment is with surgical closure of the defect.Bullet Summary:The thymus is normally visible on a pediatric chest radiograph, but it is replaced by fatty tissue after puberty.
Please Login to add comment