“ This is the most common foregut malformation in the thorax . It constitutes up to 20% of mediastinal masses. It is an abnormality of the v...
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This is the most common foregut malformation in the thorax. It constitutes up to 20% of mediastinal masses. It is an abnormality of the ventral diverticulum of the primitive foregut and is associated with other congenital anomalies, spina bifida, extra-lobar sequestration and congenital lobar emphysema.
PLAIN FILM
• Posterior or middle mediastinal mass, typically subcarinal and more common on the right
• Can be intrapulmonary—most commonly located in the medial lower lobes
CT
• Well-circumscribed spherical mass, usually with an internal density of 0-25 HU (may be higher)
• May contain an air-fluid level if communicating with an airway
• Rim-enhancement may be seen, calcification is not typical
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