CTICasesMediastinal Lymphangioma
Imaging findings
CT chest shows a massive, homogeneous, non-enhancing water-attenuation mediastinal mass encasing mediastinal vessels and compressing the trachea. Percutaneous drainage yielded milky chylous fluid.
Key takeaways
Mediastinal lymphangiomas (cystic hygromas) are benign lymphatic malformations. They can grow to massive sizes, tracking along tissue planes and encasing major vessels without invasion. Temporary decompression by draining the chylous fluid can alleviate airway compression prior to surgical excision.
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