Cutis marmorata telangiectatica congenita (CMTC)

Diagnosing cutis marmorata telangiectatica congenita (CMTC) can be difficult for primary care physicians simply because it’s such a rare condition. The specialists at the Vascular Anomalies Center, at Children’s Hospital Boston understand CMTC and can easily identify it—and determine whether your child needs treatment.

How do I know if my child has CMTC?

A physician experienced in diagnosing birthmarks can tell you whether your child has CMTC just by examining the affected area. If your child’s doctor suspects another condition might also be present, she may recommend an imaging study such as the following:

• x-ray: An x-ray is usually the first procedure performed; it gives your child’s doctor information regarding the need for further testing.

• computerized tomography scan (also called a CT or CAT scan): A CT scan shows detailed images of a specific area of your child’s body, including the bones, muscles, fat and organs. CT scans are more detailed than general x-rays.

• magnetic resonance imaging (MRI): This high-resolution scan allows the doctor to detect any related abnormality in your child’s muscles, nerves, bones and blood vessels.

When should I consult a vascular anomalies specialist?

We advise consulting a vascular anomalies specialist in a few situations:

• if your child’s birthmark seems to be growing
• if your child has any pain or bleeding from the birthmark
• if your child’s birthmark appears on her face

If your child has CMTC in conjunction with knee, hip or leg pain, this can be a sign that her legs are growing at different rates. While she may not require treatment for this, it’s important to keep an eye on the condition.