Be familiar with the different thymus gland appearances in Chest X Ray What to do next if mediastinal mass is suspected Characteristics of normal thymus tissue on ultrasound
The thymus is a lymphatic organ located in the antero-superior mediastinum.
it consist of two lateral lobes touching in the midline,
situated partly in the thorax,
partly in the neck.The two lobes are usually asymmetric in size.
They are occasionally united,
so as to form a single mass.
Sometimes they are separated by an intermediate lobe. The gland extends from as high as the lower border of the thyroid glandto the fourth costal cartilage downwards. It originates from the...
Findings and procedure details
Conventional radiography: The thymus is variable in size and position and The appearance of the thymus on frontal chest radiographs is variable and largely dependent on the age of the patient.
It may mimic cardiomegaly,
abnormally positioned vessels,
or a mediastinal mass.
The normal thymus has a soft tissue density and smooth borders. The thymus is prominent in size with a quadrilateral shape and convex margins during infancy.
After approximately the fifth year of life,...
It is important for clinicians to be able to identify normal variations in thymic appearance and avoid over-investigation. It is important to be familiar with different appearances in the normal thymus gland to be able to identify pathology and make an accurate diagnosis.
Dr Nehal Mohamed Saloum. Clinical Fellow,
Diagnostic Imaging. Hamad Medical Corporation,
Qatar. Email: email@example.com.
1) Manchanda S,
Imaging of the pediatric thymus: Clinicoradiologic approach.
World Journal of Clinical Pediatrics.
2017; 8;10-23. 2) Brian Coley et al,
Caffey's Pediatric Diagnostic Imaging ‘Twelfth Edition’.
2013; 58-65. 3) Nishino M,
The thymus: a comprehensive review.
2006; 26:335-48. 4) Leonidas JC.
The thymus: from past misconception to present recognition.
1998; 28: 275–282. 5) Slovis TL,
Aberrant thymus: MR assessment.