Café-au-lait macules (CALMs)

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Café-au-lait macules are flat marks on the skin. Find out how CALMs are diagnosed, how they affect the body and how they are treated.

Key points

  • Café-au-lait macules are harmless light to dark brown, oval, well-defined spots.
  • They are normally present from birth and can increase in number and size over time.
  • Multiple café-au-lait macules are associated with different genetic disorders.
  • See a doctor if your child has undefined hyperpigmented lesions, more than six CALMs or has CALMs with lumps and bumps on the skin.
Last updated: May 6th 2015