Alopecia and cutaneous complications of chemotherapy

Abstract

The hair growth cycle is composed of three well-recognized phases: anagen (growth), catagen (deconstruction), and telogen (resting) phases. At any time, approximately 90% of the 100,000 to 150,000 scalp hairs are in the anagen phase An in-depth discussion of hair cycling is beyond the scope of this chapter, but please refer to the referenced article for an excellent review on the current thinking on the subject. © 2006 Springer Science+Business Media, Inc.