Donor Tightness
Donor tightness refers to the laxity or looseness of the scalp tissue in the donor area—typically the back and sides...
Dense Packing
Dense packing refers to a hair transplantation approach in which follicular unit grafts are planted at a higher density than...
DHI (Direct Hair Implantation)
DHI (Direct Hair Implantation) is a hair transplantation technique in which individual follicular units are implanted into the scalp using...
Dermal Papilla
The dermal papilla is a cluster of specialized mesenchymal cells located at the base of each hair follicle that sits...
DPA (Diffuse Patterned Alopecia)
DPA (Diffuse Patterned Alopecia) refers to hair loss that shows widespread thinning across the scalp while retaining a patterned distribution...
DUPA (Diffuse Unpatterned Alopecia)
DUPA (Diffuse Unpatterned Alopecia) is a pattern of diffuse hair thinning in which hair density decreases uniformly across the scalp,...
Diffuse Thinning
Diffuse thinning refers to hair loss that causes an overall decrease in hair density across the scalp rather than isolated...
Donor Area
The donor area is the part of the scalp—most commonly the back and sides of the head—or, in some cases,...
