Description: Non pigmented Spitz nevus

History:

 The classic Spitz is pink with dot vessels and white perpendicular lines looking like a white reticular or negative network. However some amelanotic melanomas can have similar dermatoscopic features but you would hope the melanoma would at least have some polymorphic vessels to reveal it's true self. 

A pigmented Spitz usually has symetrical peripheral clods similar in size looking like a growing nevus . Centrally the clods can be blue or grey as the pigmented nevus cells are deeper in the dermis. 

The 3rd image here shows a Spitz nevus with some lines radial peripheral and a suggestion of pseudopods. This is more Reed nevus like dermatoscopically. Spitz nevi are usually more raised than a Reed nevus.

See Spitz nevus in Dermoscopy Made Simple