Figure 1. Magnetic resonance imaging of the thoracic spine showed tumor invasion in the intervertebral foramen.

From: Cardiac Sympathetic Hyperactivity of Lung Cancer-Associated Harlequin Syndrome

Figure 2. Cardiac [123I]-metaiodobenzylguanidine scintigraphy showed a normal early-phase heart-to-mediastinum ratio (2.50; reference range, 1.9-3.0) and an elevated washout rate (37.25%; reference range, 0%-34%) [(A) Early phase, (B) Delayed phase].

From: Cardiac Sympathetic Hyperactivity of Lung Cancer-Associated Harlequin Syndrome

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