|
|
||||
|
infiltration into subcutis |
no (Lesions are based in the mid dermis, often with dilated vessels superficially and do not extend into the subcutis. They are small, circumscribed, symmetrical and often wedge-shaped) |
yes |
||
|
papillary endothelial hyperplasia |
no |
yes |
||
|
prominent nucleoli |
no |
yes |
||
|
mitoses |
no |
yes |
||
|
marked cytological atypia |
no |
yes |
||
|
blood lakes |
no |
yes |
||
|
dissection of dermal collage |
limited |
yes |
||
|
anastomotic vessels |
some |
yes |
||
|
chronic inflammation |
yes |
limited |
||
|
circumscription |
yes |
no |
||
|
projection of stroma into lumen |
yes |
no |
||