Table 4.

mSWAT tool^*

Body area according to Lund and Browder15	% BSA body area	Lesion subtype
		% BSA patch	% BSA plaque/papule	% BSA tumor
Head	7
Neck	2
Left upper arm	4
Left forearm	3
Left hand	2.5
Right upper arm	4
Right forearm	3
Right hand	2.5
Anterior trunk	13
Genitalia	1
Posterior trunk	13
Buttocks	5
Left thigh	9.5
Left leg	7
Left foot	3.5
Right thigh	9.5
Right leg	7
Right foot	3.5
Total BSA	100
Weighting factor		1	2	4
Product BSA × weighting factor
mSWAT score

^*The mSWAT score assesses the total skin involvement in PCL by the summation of the product of the approximate BSA covered by 1 of 3 types of skin lesions (patch, plaque, or tumor) multiplied by the weighting of 1, 2, or, 4, respectively, for lesion type. The percent BSAs per body area in the above table are from Lund and Browder.²⁹