What are the 4 key characteristics of a BCC?

Crusted Lesion    
Pearly Appearance     green tick
Under 5mm Diameter    
Raised, Rolled Edge     green tick
Telangectasia     green tick
Punched Out Edge    
Ulcerated Centre     green tick
Raised, Shelved Edge    
> 3 Colours Present    
Bleeding    

Well done. You have scored 10 out of 10.