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Glossary
of Terms
ALOPECIA
ANDROGENETIC ALOPECIA
ALOPECIA
REDUCTION
CROWN AREA
DONOR AREA
DONOR
DOMINANCE
FEMALE PATTERN BALDNESS
FOLLICULAR
UNIT
FOLLICULAR UNIT EXTRACTION (FUE)
FOLLICULAR UNIT GRAFT
FOLLICULAR UNIT MICROGRAFTING
GRAFTING
HAIR
ECONOMICS
HAIR FLAPS
HAIR FOLLICLE
HAIR GRAFTS
HAIR "PLUGS"
HAIR
TRANSPLANT
HAIRLINE REFINEMENT
MALE
PATTERN BALDNESS
MICROGRAFT
MINIGRAFT
MULTI-UNIT GRAFTS(MUG)
MULTI-UNIT GRAFTING
RECIPIENT
AREA
ROUND GRAFT
SCALP
REDUCTION
SCALP
ROTATION FLAPS
SLIT GRAFT
TEMPLES/TEMPORAL AREA
TEMPORAL
POINT
TISSUE
EXPANDER
TISSUE
EXTENDER
VERTEX AREA
ALOPECIA:
The medical term for baldness.
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ANDROGENETIC ALOPECIA:
The most typical pattern of balding whereby the balding
pattern is controlled by hormones and passed along via
heredity.

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ALOPECIA REDUCTION:
A procedure that involves removal of a strip of balding
upper scalp in the crown and vertex areas. The natural
flexibility of the scalp is used to stretch the surrounding
hairy scalp into place. It can be repeated in certain cases.
See also "Scalp Reduction."

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CROWN AREA:
The area in the top/back portion of the head which contains
a swirl or spiral pattern of hair growth. Also called the
'vertex,' it may be the first area where male pattern
baldness is noticed.

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DONOR AREA:
The fringe above the ears and around the back of the head
where hair follicles are genetically programmed to remain
intact and grow throughout life.

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DONOR DOMINANCE:
The concept that hair follicles transplanted from the donor
area will continue to grow in the recipient area.
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FEMALE PATTERN BALDNESS:
A hereditary pattern of baldness found in women typically
characterized by a diffuse thinning of hair and/or hair loss
at the front portion of the scalp behind the frontal
hairline. May or may not include a slight recession or
thinning in the temples and only very rarely ends in
complete baldness at the top of the scalp. Also called
"Female Hereditary Hair Thinning."

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FOLLICULAR UNIT:
A follicular unit is a naturally occurring grouping of one,
two, or three (and rarely, four) hair follicles found in the
skin. The average follicular unit contains about 2.4 hairs.

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FOLLICULAR UNIT
EXTRACTION (FUE):
Follicular Unit Extraction is a method of extracting single
follicular units, one at a time, from the donor site by
using a tiny punch excision. A punch used to extract single
follicular units is typically 1mm diameter or less.
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FOLLICULAR UNIT GRAFT:
A graft consisting of a single follicular unit. In
appropriate patients, artistic planning - in addition to the
correct angulation, orientation, and positioning of
follicular unit grafts - can yield an exceptionally
"natural" appearance of the transplanted hair.

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FOLLICULAR UNIT
MICROGRAFTING: A
method by which large numbers of follicular units are
harvested from the donor site (usually in a long strip or
ellipse) and then microscopically dissected into grafts
containing single follicular units.

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GRAFTING:
A variety of procedures where hair-bearing skin is removed
from the lower scalp at the back of the head-the "donor
area"-and transferred to thinning or balding areas. The most
popular varieties are micrografting (1-2 hairs) and
minigrafting (3-8 hairs). A few surgeons selectively use
round grafts which have 10-20- hairs each.
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HAIR ECONOMICS:
A theory that states only a limited or decreasing supply of
hair exists, but the demand for hair increases as balding
patterns develop.
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HAIR FLAPS:
Techniques to rotate large portions of hair from the sides
and back of the scalp to the front and central areas of the
head. Most effective when used with a tissue expander. See
also "Scalp Rotation Flaps."
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HAIR FOLLICLE:
A strand of hair and its root which is extracted from the
donor area and transplanted to the recipient area during
hair restoration surgery.

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HAIR GRAFTS:
Hair follicles that have been harvested from the donor area
and are ready for transplantation into the recipient area of
the scalp. The numbers of hair follicles per graft vary
widely depending upon the transplantation technique used. A
graft may contain a single hair follicle, a single
follicular unit, multiple follicular units, or even 20 or
more follicles (as in a large round graft).

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HAIR "PLUGS":
A slang term typically used to describe the large round
grafts that were used more commonly years ago.
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HAIR TRANSPLANT:
A surgical technique that transfers hair follicles from the
donor area to the recipient area.
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HAIRLINE REFINEMENT:
Hairline Refinement or "Hairline Correction" refers to the
use of a variety of newer, more delicate grafting techniques
to alter, camouflage or soften the "pluggy" looking results
of older hair transplant techniques.

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MALE PATTERN BALDNESS:
An inherited condition in men which is triggered by the
hormone Dihydrotestosterone which causes gradual
miniaturization (and eventual loss) of hair follicles.
Starting anytime after puberty with a recession of the
hairline and thinning of the crown areas, it can eventually
lead to complete baldness at the top of the scalp. The areas
around the sides and back of the scalp are not typically
affected by male pattern baldness.

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MICROGRAFT:
A graft containing 1 or 2 hairs, obtained from the donor
area with a micropunch or sliced off from a round graft (see
below). A micrograft is typically placed into holes made in
the scalp with a microneedle or punch.
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MINIGRAFT:
A graft containing 3 or 4 hairs (small minigraft) or 5 or 6
hairs (large minigraft). There are many variations of
minigrafts derived from round grafts.
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MULTI-UNIT GRAFTS(MUG):
Grafts that contain two or more follicular units in a single
graft. This term replaces the older "minigraft". In practice
today, MUGs contain 2-6 follicular units per graft.
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MULTI-UNIT GRAFTING:
Hair transplantation using multi-unit grafts. In practice,
these grafts may be placed into small round holes, slots, or
slits. This would always be in combination with the use of
FUT in the same procedure.
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RECIPIENT AREA:
Area where hair loss has occurred and hair follicles will be
implanted during a hair transplant procedure.

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ROUND GRAFT:
The first type of graft used in hair transplantation, a
round graft has many variations. Harvested with punches of
various sizes, a large round graft may contain many hairs
(20 or more). The round graft is obtained from the donor
site by surgical removal and may be used "as is" or may be
sliced into smaller sections for micro-, mini- or slit
grafts.
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SCALP REDUCTION:
A procedure that removes bald scalp and brings the edges of
hair-bearing scalp closer together. Scalp reduction is most
often used in patients with crown baldness. See also
"Alopecia Reduction."
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SCALP ROTATION FLAPS:
A type of procedure that involves the lifting and rotation
of a strip of hairy scalp which is placed into an area of
simultaneously removed balding skin.
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SLIT GRAFT:
Hair obtained from a donor site directly or sectioned from a
larger round graft is inserted into a slit made in the scalp
by the tip of a scalpel blade.
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TEMPLES/TEMPORAL AREA:
The two upper outer corners where the forehead meets the
hairline. This is usually the first area where male pattern
baldness is observed, causing the hairline to recede.
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TEMPORAL POINT:
The two triangular shaped areas of hair located in the lower
outer corners of the forehead, where the temporal hairline
meets the sideburns.
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TISSUE EXPANDER:
A reconstructive balloon-like device which can be used to
enlarge hair-bearing scalp on the sides of the head,
providing a larger supply of hair with which to replace the
bald areas. Often used in hair flap techniques and scalp
reductions.
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TISSUE EXTENDER:
A device used to stretch scalp. Often used to speed up the
process of scalp reductions by stretching the sides of the
scalp that contain hair to achieve rapid elimination of bald
areas. The tissue extender is temporarily inserted below the
scalp and remains in place for a three-week period.
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VERTEX AREA:
The area in the top/back portion of the head which contains
a swirl or spiral pattern of hair growth. Also called the
'crown,' it may be the first area where male pattern
baldness is noticed.
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