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Home > Hair Loss > Hair Loss Symptoms
Norwood scale for diagnosis of androgenetic
alopecia in male (men)
Hair Loss
Symptoms and Testing
Degree by Yourself
The extent and pattern of male pattern baldness is often classified using a scale. Originally developed by Dr James Hamilton in the 1950s the pattern baldness classification system was modified to its current form by Dr O'Tar Norwood in the 1970s. Dr Norwood's basic scale of pattern baldness is illustrated and described as below.
Type I : The type one pattern indicates minimal hair
loss.
Type II :
In type two, there are usually limited
areas areas of recession of the hair line at the
temples.
Type III : Type three is actualy the first level on the scale that a dermatologist would regard as real pattern baldness and something that
needs treatment. Most type three scalps have deeper symmetrical recession at the temples. The affected areas are bare or only sparsely covered by hair.
Type III vertex : In this presentation, the hair loss is somewhat different with hairl oss from the vertex (the back of the head) and with only very limited hair line recession.
Type IV :
With type four on the scale the hair loss
is more extensive than in type three.
At this stage
there is sparse hair or no hair on the vertex. The
hair line recession and the hair loss fro mthe
vertex are seperated by a band of moderately dense
hair that extends across the top. This band connects
with the fully haired fringe on the sides of the
scalp.
Type V :
With development of type five pattern hair
loss, the vertex hair loss region is still seperated
from the frontotemporal region but it
is less
distinct. Here ,the band of surviving hair across
the crown is narrower and sparser. The vertex and frontotemporal regions of hair loss are bigger.
Type VI : In type six, the bridge of hair that
crossed the crown is now gone with only some sprase
hair remaining.
The hair line recession and vertex
hair loss areas have now joined together and the
extent of hair loss is greater.
Type VII : Type seven is the most severe form of hair
loss.
In people with this most extensive hair loss
presentation, only a narrow band of of hair in a
horseshoe shaps survives on the sides and back of
the scalp. There is little or no hair on the top of
the head and the frontal hair line no longer exists.
