Cutis marmorata telangiectatica congeita (CMTC) Symptoms & Causes

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What are the symptoms of cutis marmorata telangiectatica congenita (CMTC)?

CMTC is primarily a cosmetic concern. Sometimes children with CMTC are more affected by cold temperatures than other children. The birthmark often becomes more prominent during cold weather.

The only sign of CMTC is the birthmark itself: a deep purple, net-like staining pattern that usually appears on your child’s trunk or legs.

In rare cases CMTC can lead to:

  • ulceration (bleeding) of the areas of the skin where the birthmark appears, sometimes accompanied by pain
  • slower growth of the limb where the birthmark appears, which can result in your child’s legs being of different lengths and could lead to trouble and/or pain with walking

However, these symptoms occur in less than one percent of children with CMTC.

What causes cutis marmorata telangiectatica congenita?

No one knows the cause of cutis marmorata telangiectatica congenita. 

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