Type 1

Minimal or no recession of the hair line.

Type 2

Triangular, usually symmetrical, areas of recession at the front temporal hair line.

Type III

This represents the minimal extent of hair loss sufficient to be considered as baldness. Most type III scalps have deep symmetrical recession at the temples that are bare or only sparsely covered by hair.

Type 3 Vertex

In this presentation, the hair loss is primarily from the vertex (where the two sides of the hair meet in the middle of the scalp), with limited recession of the front temporal hair line that does not exceed the degree of recession seen in type 3

Type 4

The front temporal recession is more severe than in type 3. There is sparse hair or no hair on the vertex. The two areas of hair loss are separated 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 4 is distinguished from type 3 vertex in which the loss is primarily from the vertex.

Type 5

The vertex hair loss region is still separated from the front temporal region but it is larger and more distinct. The band of hair across the crown is narrower and sparser. The vertex and front temporal regions of hair loss are bigger. Viewed from above, types 5, 6, and 7 are all characterized by surviving hair on the sides and back of the scalp forming a distinct horseshoe shape.

e 3

Type 6

The bridge of hair that crossed the crown is now gone with only sparse hair remaining. The front temporal and vertex regions are now joined together and the extent of hair loss is much greater.

Type 7

The most severe form of hair loss presents as extensive loss. A narrow band of hair in a horseshoe shape survives on the sides and back of the scalp. This hair is usually not dense and may be quite fine. The hair is also sparse on the nape of the neck and in a semi circle over both ears.