Weedon

 
"Superficial spreading melanoma is characterized by a proliferation of atypical melanocytes, singly and in nests, at all levels within the epidermis. This pagetoid spread within the epidermis is sometimes known as 'buckshot scatter'. Superficial adnexal epithelium may also be involved." Weedon D. Skin pathology. London: Churchill Livingstone Inc., 1997:693.
 

Brief Critique

 
Pagetoid melanocytes in pagetoid pattern usually signify melanoma, but that finding is not invariable. Despite that reality, it is the lynchpin of the criteria advocated by Weedon.