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Surgical treatment of male pattern baldness.
Four surgical methods are used to treat male pattern baldness. They are hair grafts, hair flaps, excision (scalp reduction) and expansion.
- Hair Grafts: A graft is a small area of hair bearing scalp which is moved from one area of the scalp to another. In this way bald areas are replaced with hair bearing skin. When a graft is moved it loses its blood supply and must reestablish a new one.
- Hair Flaps: A flap is a piece of scalp which is moved to another location but retains its blood supply. Large areas of hair bearing skin can be moved in this way. A variant of this is a free flap. In this situation the skin is detached, as in a graft, but after it is moved its blood supply is reestablished by linking it to blood vessels in the new location.
- Excision or Scalp Reduction: scalp reduction involves removing the hairless areas and stretching the remaining scalp to cover the defect.
- Tissue Expansion: expansion is a technique in which small balloons are placed beneath hair bearing scalp. The balloons are expanded over several weeks. This stretches the hair bearing skin. In this way new skin is made available to stretch over the bald area.