Alopecia: Kids are not just little people.

Alopecia is a disorder that affects all patients, young and old. Many diagnoses, particularly the scarring alopecias, are more common in adults; however, others, such as tinea capitis, are more common in children, and some, such as alopecia areata, often affect both age groups. The approach to, and evaluation of, an alopecia patient is thus highly dependent on his or her age. In adults with diffuse, non-scarring hair loss, a part-width examination can help detect pattern hair loss, the most common cause of diffuse loss in this age group. In children this is much less likely, and a careful evaluation for tinea capitis is in order. The same holds true for patchy alopecia in children, as well as scarring alopecia-tinea needs to always be considered. In adults, patchy alopecia is often due to alopecia areata and sometimes to one of the primary scarring alopecias. A laboratory evaluation, and especially a biopsy, would be a more appropriate undertaking for an adult than a child, and an adult would be more likely to tolerate certain therapeutic regimens such as intralesional injections. In a conversational manner, the authors discuss their individual approaches to the alopecia patient, highlighting the differences in diagnosis, workup, and management that depend on whether the affected individual is an adult or a child.