mother and daughter
mother and daughter
mother and daughter

Pilomatrixoma in Children

What is a pilomatrixoma in children?

A pilomatrixoma (PY-lo-may-trick-SO-mah), also known as pilomatricoma, is a slow-growing, usually non-cancerous, skin tumor of the hair follicle. It is most common on the face and neck, but it may be on other parts of the body. A pilomatrixoma is usually a single lump, but occasionally, there may be more than one. Pilomatrixomas are more common in children and young adults than in older adults.

What causes a pilomatrixoma in a child?

Pilomatricoxas develop when cells harden and form a lump under the skin. The cells are similar to hair follicle cells.

Pilomatrixomas may be more common in some families. They may also happen with conditions that are inherited (genetic syndromes).

What are the symptoms of a pilomatrixoma in a child?

Here are the most common symptoms of a pilomatrixoma:

  • A small, hard lump beneath the skin, usually on the face or neck
  • The skin covering the lump looks normal or may have a blue hue
  • The mass is usually painless, unless it becomes infected

The symptoms of a pilomatrixoma can be like other health conditions. Make sure your child sees his or her healthcare provider for a diagnosis.

How is a pilomatrixoma diagnosed in a child?

A pilomatrixoma is usually diagnosed based on how it looks and feels. Diagnostic tests may include:

  • Biopsy. A sample of tissue is taken and looked at under a microscope.
  • Imaging. X-ray, ultrasound, CT scan, or MRI may be done, but not always.

How is a pilomatrixoma treated in a child?

Treatment may include surgery to cut out the lump. Covering the area with skin from another part of the body may be needed, depending on the size of the lump.

What are the possible complications of a pilomatrixoma in a child?

Most children do not face any serious complications. But pilomatrixomas can become cancerous in rare cases. Pilomatrixomas can also come back after they are removed.

When should I call my child’s healthcare provider?

Call your child’s healthcare provider if you notice any skin lumps or masses.

Key points about pilomatrixomas in children

  • A pilomatrixoma is a slow-growing, usually non-cancerous skin tumor of the hair follicle.
  • It is most common on the face and neck.
  • Treatment may include surgery to remove the lump.

Next steps

Tips to help you get the most from a visit to your child’s healthcare provider:
  • Before your visit, write down questions you want answered.
  • At the visit, write down the names of new medicines, treatments, or tests, and any new instructions your provider gives you for your child.
  • If your child has a follow-up appointment, write down the date, time, and purpose for that visit.
  • Know how you can contact your child’s provider after office hours. This is important if your child becomes ill and you have questions or need advice.

Pediatric Otolaryngology

Jonathan Walsh with patient

Our pediatric otolaryngologists provide compassionate and comprehensive care for children with common and rare ear, nose, and throat conditions. As part of the Johns Hopkins Children's Center, you have access to all the specialized resources of a children's hospital.  

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