Esophagus cancer overriding vertebral body

In not so many cases, the upper portion of esophagus locates in the left side of thoracic vertebra, and lower portion may locate in the right side of vertebra, so middle portion overrides vertebral body. If we treat such cases, there will be many difficulties (lung doses, inhomogenity of GTV, spinal doses etc.).

This sample plan was made for such situations.

CTV=GTV+10mm

PTV=CTV+5mm 

Rotational port (No.3) is 40 deg arc. (340->20)

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PTV + 5mm leaf margin

 

 last modification date: 2006/12/08