Overview
Pili torti-onychodysplasia syndrome is an extremely rare genetic condition that affects the hair and nails. The name describes its two main features: "pili torti" refers to hair shafts that are flattened and twisted, making the hair brittle, dry, and prone to breaking easily. "Onychodysplasia" means abnormal development of the nails, which may appear thickened, ridged, discolored, or misshapen. Together, these features point to a problem with how the body builds certain structural proteins, particularly keratin, which is the main building block of both hair and nails. People with this syndrome typically notice that their hair is sparse, fragile, and difficult to grow to a normal length. The nails may be slow-growing, split easily, or have an unusual texture. In some reported cases, additional features such as dental abnormalities or mild skin changes have also been described, though the condition primarily affects the hair and nails. Because this syndrome is so rare, there is no specific cure or targeted treatment available. Management focuses on protecting the hair and nails from further damage, using gentle hair care products, and addressing any cosmetic concerns. Dermatologists and geneticists are the main specialists involved in diagnosis and care. While the condition is not life-threatening, it can have a significant impact on self-esteem and quality of life, especially during childhood and adolescence.
Key symptoms:
Twisted and flattened hair shaftsBrittle hair that breaks easilySparse or thin hairDry and lusterless hairAbnormally shaped nailsThickened or ridged nailsNails that split or crack easilySlow nail growthDiscolored nailsPossible dental abnormalities
Clinical phenotype terms (20)— hover any for plain English
Autosomal recessive
Passed on when both parents carry the same gene change; often skips generations
Childhood
Begins in childhood, roughly ages 1 to 12
Treatments
No FDA-approved treatments are currently listed for Pili torti-onychodysplasia syndrome.
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Specialists
View all specialists →No specialists are currently listed for Pili torti-onychodysplasia syndrome.
Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Pili torti-onychodysplasia syndrome.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
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Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What specific type of hair and nail disorder does my child have, and how was the diagnosis confirmed?,Is genetic testing recommended for our family, and what would it tell us?,Are there any treatments or supplements that could improve hair or nail growth?,Will the hair and nail problems get better or worse over time?,What hair care and nail care routines do you recommend?,Should we see a genetic counselor to understand the chances of this condition in future children?,Can you recommend any psychological support resources for coping with the cosmetic effects?
Common questions about Pili torti-onychodysplasia syndrome
What is Pili torti-onychodysplasia syndrome?
Pili torti-onychodysplasia syndrome is an extremely rare genetic condition that affects the hair and nails. The name describes its two main features: "pili torti" refers to hair shafts that are flattened and twisted, making the hair brittle, dry, and prone to breaking easily. "Onychodysplasia" means abnormal development of the nails, which may appear thickened, ridged, discolored, or misshapen. Together, these features point to a problem with how the body builds certain structural proteins, particularly keratin, which is the main building block of both hair and nails. People with this syndrom
How is Pili torti-onychodysplasia syndrome inherited?
Pili torti-onychodysplasia syndrome follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.
At what age does Pili torti-onychodysplasia syndrome typically begin?
Typical onset of Pili torti-onychodysplasia syndrome is childhood. Age of onset can vary across affected individuals.