Hair transplant in scalp scar?

Thank you for writing, and it's great that the melanoma was removed at an early stage — that's the main thing.
Now to the point: yes, hair transplantation to this area is entirely possible, even if the skin there is slightly thinner than the rest of the head. The fact that the area has blood flow and has healed well is a very good sign. Usually, it is precisely these areas that are suitable for transplantation.
By the way, even scar tissue can be transplanted with hair — this is done quite often. But it is important to understand that in such cases, the percentage of engraftment may be slightly lower because the blood supply in scar tissue is weaker. In rare cases, with very poor blood flow, even localised tissue death (necrosis) is possible — that is why such areas need to be evaluated particularly carefully.
It all comes down to several factors:
How pronounced the scar itself is
Its thickness and elasticity
The general condition of the skin and the body
And, of course, who performs the transplant and how
For our part, we can say that we have performed transplant operations on scarred areas many times and know how to work with them as delicately and effectively as possible.

Hair transplantation into scar tissue, such as a scalp scar left after melanoma removal, is indeed possible and has been successfully performed in many cases. Here are some considerations:

Assessing the Scar Tissue:

The success of a hair transplant in scar tissue largely depends on the characteristics of the scar, including its thickness, blood supply, and flexibility. Since you've mentioned that the area is blanchable, it suggests there is some blood flow, which is a positive sign.
Feasibility of Transplant:

Hair follicles can be transplanted into scar tissue, but the growth rate can be lower compared to normal scalp skin. An experienced hair transplant surgeon can evaluate the scar and determine if transplantation is viable.
Techniques Used:

Techniques like Follicular Unit Extraction (FUE) or Follicular Unit Transplantation (FUT) can be used. FUE is often preferred for scar tissue due to its minimally invasive nature and ability to precisely place grafts.
Success Stories:

Many patients have had successful outcomes with hair transplants in scarred areas, experiencing improved appearance and confidence. However, results can vary, and multiple sessions might be needed to achieve desired density.
Consultation with a Specialist:

It's essential to consult with a dermatologist or a hair restoration specialist who has experience with scar tissue transplants. They can provide a detailed assessment and discuss potential outcomes and expectations.
Post-Procedure Care:

Follow-up care and adherence to post-procedure instructions are crucial for optimal healing and hair growth.
Seeking advice from a qualified professional will help you understand the specific possibilities and limitations in your case.

Yes, hair can often be transplanted into a scarred area like yours if there is adequate blood flow, as you described. Many patients have seen success in similar cases, but the outcome depends on factors like the thickness of the skin and vascular health. I recommend consulting with a specialist to assess your specific situation and determine the best approach.