What is a Pancoast tumor?
Pancoast tumors form at the very top of either lung. They are usually non-small cell lung cancers. Because of their location, they frequently invade adjoining tissue.
Pancoast tumors form an abnormal patch of tissue over the lung apex and principally involve the chest wall structures rather than the underlying lung tissue. They may invade areas such as lymph nodes, nerves, ribs, and spine.
From: Pancoast Tumors WebMD Medical Reference
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