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- How is axillary freckling different from the freckling not associated with NF1? In people who do not have NF1, freckling typically appears on areas of the body exposed to the sun, and axillary freckling is rare. As a result, axillary freckling is considered a strong indicator of NF1 when it is present.
- Is it harmful? No, axillary freckling causes no medical problems.
- How common is it? Axillary freckling is present in more than 90 percent of people with NF1.
- When does it show up? Axillary freckling usually appears during childhood.
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