These photos show the resulting scalp necrosis caused by a bad hair transplant. During a hair transplant procedure, if the hair grafts are packed tightly next to each, there is not enough blood supply to feed the center of the scalp. The center of the scalp receives blood via small tributaries from larger blood vessels at the front, back and sides of the head. These tightly packed grafts have a chocking effect and prevents the area from receiving enough blood and the flesh ultimately dies.
This is a devastating complication reflecting poor judgement on the part of the doctor. The treatment for this is balloon expanders as described in this link from a previous post https://newhair.com/baldingblog/2017/06/02/necrosis-poor-hair-transplant-technique-treatment-works-2/
I have seen patients in consultation for this problem many times in my 27 years of practice in the field of hair restoration surgery. Fortunately, in the 15,000+ surgeries my medical group has done, we have never seen such a problem.