The British Association of Dermatologists' Diagnostic Index Body Site coding.

National codes:

0	Scalp
1	Face
2	Forehead/temples
3	Eyelid/periocular
4	Eye
5	Nose
6	Cheek
7	Lips/perioral
8	Mouth
9	Tongue
A	Teeth and Gingivae
B	Beard area
C	Neck
D	Ear/pre/post-auricular
E	Toe
F	Foot/plantar
G	Hand & Foot/palmoplantar
H	Hand/palmar
J	Finger/thumb
K	Forearm/wrist
L	Arm
M	Leg/ankle
N	Thigh
P	Fingernails
Q	Nails/paronychial
R	Toenails
S	Trunk
T	Flexures
W	Genital
X	Penis
Y	Vulva
a	Scrotum
b	Perianal/perineal
c	Breast/nipple
d	Umbilicus
e	Axilla

References:
National Cancer Data Set Version 2.1_ISB October 2002