463 / 1609
•
About half of the skin
cancer patients will
develop a new
unrelated primary
lesion within 5 years
after the initial
diagnosis
•
Over 80% occur in the
head and neck region
•
Lesions mainly affect
cosmetically sensitive
areas: face, nose
(30%), eyelids, ears,
scalp, lips
•
90% of lesions are
small, <20mm and
thickness is confined
to a few mm
.
J. Locke, et al “Radiotherapy for
epithelial skin cancer,”
Int. J.
Radiation Oncology Bio. Phys.,
vol. 51, no. 3, pp. 748-755, 2001
.
Anatomical distribution
Basal cell ca (red) and Squamous cell ca (blue)