Fig.
17: Diagram,
T4 disease. Extrathoracic
tumor extension involving
mediastinal structures
or the vertebral body
and brachial plexus,
as shown in the example
of Pancoast's tumor.
Fig.
18a: Posterior-anterior
chest radiograph showing
Pancoast tumor in the
left apex with destruction
of left upper ribs and
invasion of the upper
thoracic spine. This
is a T4 lesion.
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