Let's start this material with the classic situation that has become.
A person comes to an appointment with a doctor (dermatologist or oncologist), shows him moles.
And then there is something like this dialogue:
– You have dysplastic nevi here, here and here.
– What is it? Is it dangerous?!
– Dysplastic nevi are such moles with an uneven edge and a non–uniform color. Dysplastic nevi can turn into melanoma, so they need to be removed.
– Oh!!! How scary!!! Let's delete it soon!!!
Moles are safely removed, sent for histology.
A person comes home and starts reading on the Internet about dysplastic nevi аnd there they add fuel to the fire:
- Dysplastic nevus is any nevus with an uneven edge, uneven coloring.
- All dysplastic nevi turn into melanoma in 100% of cases.
- To prevent death from melanoma, you need!!! URGENT!!! remove all dysplastic nevi.
All this "beauty" has been rewritten from one site to another for many years and overflows the Internet to the brim.
Let's deal with all this from the point of view of evidence-based medicine.What is dysplastic nevus?
The most important thing to note here is that dysplastic nevus is a histological diagnosis. This means that it is possible to understand whether you have a dysplastic nevus or a normal one only after the removal of the formation. This diagnosis is made by a pathologist when studying a biopsy of a removed mole, based on strictly defined criteria.
The diagnosis of "dysplastic nevus" cannot be made with a simple visual examination.
Why then do many doctors scare us when examining dysplastic nevi? Because in dermatooncology, the concepts of "dysplastic" and "clinically atypical" have been mixed for a long time.
What is the difference?Clinically atypical nevus – what is it?
There has been clarity here since 1990, when the International Agency for Research on Cancer (IARC) defined what should be called an "atypical nevus".