Vessels Polymorphous no Dots

Polymorphous no Dots

BCC 

Seb K irritated 

Bowens/SCC \

LPLK 

Melanoma

Polymorphous Vessels Typically melanoma will show a collection of different vessel types and when two or more vascular patterns are seen in a lesion they are termed polymorphous. These can include dotted, curved, linear irregular, coiled or helical with dotted and linear irregular being the most frequent combination. The lesion pictured below is a 2.3 mm thick amelanotic nodular melanoma. The most striking feature of this lesion is the multitude of irregular blood vessels. There are linear irregular, glomerular and comma vessels present. 

View another example of polymorphous vessels in Dermoscopy Atlas

View this Video on Kittlerian Vessel Terminology