Could a person with adhd be a neurosurgeon ?

Certainly possible: There are many with adhd who get treatment so that the symptoms do not interfere significantly with other things in their lives, including complex skill sets. So yes, it is possible. It is also very important to know that what can look like true, neurologically based adhd can also be from other things such as anxiety, depression, family problems, etc. Treatment for the right condition will help.

If treated, yes: It depends on how severe the adhd is, how committed the person is to getting help for it, and how successful that treatment is. A neurosurgeon has to be able to focus intensely in very small areas, and organize surgical approaches and process for patient welfare. Impulsiveness must be managed, and the inner urge to move has to be managed also. These are also areas of treatment in adhd.