Lymphocele of the thoracic duct

Discussion:

This patient had a long standing soft palpable mass in the left side of the neck. A neck CT with IV contrast was performed and the lesion was believed to be a lymphangioma. Subsequently, a non-contrast chest CT was performed and the tubular/cystic mass extended from the left neck to the posterior mediastinum and to the level of the cisterna chyli, consistent with a lymphocele of the thoracic duct.

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