Multiple Familial Trichoepithelioma
Inherited benign tumors of the hair follicles
Quick Facts
- Type: Inherited benign skin tumor condition
- Genes involved: CYLD gene
- Common area: Central face, especially around the nose
- Nature: Benign, but slow-growing and persistent
Overview
Multiple familial trichoepithelioma is a rare inherited skin disorder marked by the development of many small, benign tumors that arise from hair follicle cells. These growths, called trichoepitheliomas, typically appear as firm, skin-colored bumps clustered on the central part of the face, particularly around the nose, eyelids, upper lip, and cheeks. They usually begin in childhood or adolescence and slowly increase in number over time.
The condition is inherited and is part of a group of disorders linked to changes in the CYLD gene, which also includes Brooke-Spiegler syndrome and familial cylindromatosis. Although the tumors are not cancerous, they can become numerous and disfiguring, and rarely one can transform into a skin cancer, so people are usually monitored over time.
Symptoms
The main feature is the gradual appearance of multiple small skin tumors:
- Firm, round, skin-colored or slightly pink bumps a few millimeters across
- A typical location on the central face, especially the folds beside the nose
- Slow growth in number, often starting in the teenage years
- Usually painless and not itchy
Over many years the bumps can become numerous enough to alter facial appearance, which can affect self-confidence. Rapid growth, ulceration, or bleeding of a single lesion is unusual and should be evaluated, since it could signal a change into a basal cell carcinoma.
Causes
The condition is genetic and most often linked to mutations in the CYLD gene, which normally acts as a tumor suppressor that helps regulate cell growth.
- Inherited mutation: The altered gene is usually passed down from a parent in an autosomal dominant pattern.
- Tumor suppressor loss: When the CYLD gene does not function properly, hair follicle cells grow abnormally and form the characteristic tumors.
Because it is inherited, the condition tends to run in families, and several relatives across generations may be affected.
Risk Factors
- A parent or relative with multiple facial skin tumors
- A known family CYLD gene mutation
- Family history of related conditions such as cylindromas or Brooke-Spiegler syndrome
Diagnosis
Diagnosis is based on the appearance and distribution of the bumps, family history, and tissue examination:
- Clinical examination: A dermatologist notes the characteristic central-face clustering of multiple firm bumps.
- Skin biopsy: Removing a small sample to confirm the diagnosis under the microscope and rule out skin cancer, which trichoepitheliomas can resemble.
- Genetic testing: May identify a CYLD mutation and help relatives understand their risk.
Treatment
Because the tumors are benign, treatment is mainly for cosmetic reasons and to monitor for rare changes. Options include:
- Laser therapy: Lasers can reduce or remove individual bumps, often used for widespread facial lesions.
- Surgical removal: Cutting out larger or bothersome lesions, or any that look suspicious.
- Other procedures: Electrosurgery, dermabrasion, or cryotherapy may be used in some cases.
Tumors can recur after treatment because the underlying genetic cause remains, so repeat procedures are sometimes needed. Regular skin checks help catch the rare lesion that could become cancerous.
Prevention
- The inherited condition itself cannot be prevented
- Regular dermatology checks allow early treatment and monitoring for changes
- Sun protection supports overall skin health
- Genetic counseling helps affected families understand inheritance and testing
- Prompt evaluation of any rapidly changing or ulcerating lesion
When to See a Doctor
See a dermatologist if you develop multiple small facial bumps, especially with a family history of the condition. Seek medical evaluation promptly if any individual lesion:
- Grows quickly or becomes much larger than the others
- Bleeds, ulcerates, or fails to heal
- Becomes painful or changes color
These changes are uncommon but can rarely indicate transformation into a skin cancer that needs treatment.
Frequently Asked Questions
Are trichoepitheliomas cancerous?
No, trichoepitheliomas are benign tumors of the hair follicle and are not cancer. Very rarely, a single lesion may transform into a basal cell carcinoma, which is why dermatologists monitor the bumps and check any that grow or change.
Why do these bumps appear mainly on the face?
Trichoepitheliomas arise from hair follicle cells and tend to cluster in areas rich in follicles on the central face, particularly around the nose, eyelids, and upper lip. This distribution is a characteristic feature of the condition.
Can the bumps be removed permanently?
Individual bumps can be removed with laser, surgery, or other procedures, but because the underlying gene change remains, new lesions can continue to form. Repeat treatments over time are often needed for cosmetic control.
Is multiple familial trichoepithelioma inherited?
Yes. It usually follows an autosomal dominant pattern, often linked to the CYLD gene, so it tends to run in families. Each child of an affected parent has a 50 percent chance of inheriting the gene change.
Will my children develop this condition?
If you carry the gene change, each child has about a 50 percent chance of inheriting it, though the number and severity of bumps can vary. Genetic counseling can help your family understand the risk and options.
References
- Genetic and Rare Diseases Information Center (GARD). Multiple familial trichoepithelioma.
- MedlinePlus Genetics, U.S. National Library of Medicine. CYLD cutaneous syndrome.
- National Organization for Rare Disorders (NORD). Brooke-Spiegler Syndrome.
- DermNet. Trichoepithelioma.