Multiple Melanoma Mean Breslow p In situ p
First tumor N=10 (25.6%) 0.64mm 0.065 20% 0.152
Successive N= 29 (74.4%) 0.33mm   48.30%  
Familial Melanoma Mean Breslow p In situ p
Index case N=37 (61.7%) 1.4mm 0.713 25% 0.033
Notindex case N=23 (38.3%) 0.73mm   52.20%  
Table 2: Multiple and familial melanoma. Mean Breslow thickness and percentage of in situ type melanomas