Pili torti-developmental delay-neurological abnormalities syndrome

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ORPHA:2891OMIM:261990Q84.1
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Overview

Pili torti-developmental delay-neurological abnormalities syndrome is an extremely rare genetic condition that combines unusual hair, delayed development, and problems with the nervous system. The name 'pili torti' refers to a specific hair abnormality where the hair shaft is flattened and twisted at irregular intervals, making the hair brittle, dry, and prone to breaking easily. Children with this syndrome typically show delays in reaching developmental milestones such as sitting, walking, and talking. Neurological problems can include seizures, low muscle tone (hypotonia), and intellectual disability of varying severity. This condition is sometimes grouped with other syndromes that feature pili torti alongside neurological findings, such as Menkes disease and Bjornstad syndrome, but it is considered a distinct entity. The exact genetic cause has not been fully established in all reported cases, which makes diagnosis challenging. There is currently no cure for this syndrome. Treatment focuses on managing individual symptoms, such as anti-seizure medications for epilepsy, physical therapy and occupational therapy for developmental delays, and speech therapy for language difficulties. Hair care strategies can help manage the fragile hair. Early intervention services are important to support the child's development and maximize their potential. Because so few cases have been described in the medical literature, much remains to be learned about the full spectrum of this condition and its long-term outlook.

Key symptoms:

Brittle, dry, and easily breakable hairTwisted or flattened hair shafts (pili torti)Delayed speech and language developmentDelayed motor milestones like sitting and walkingIntellectual disabilitySeizures or epilepsyLow muscle tone (floppy muscles)Poor coordinationShort stature or poor growthSparse or thin hairLearning difficultiesBehavioral challenges

Clinical phenotype terms (10)— hover any for plain English
Pili tortiHP:0003777Abnormality of hair textureHP:0010719Sparse or absent eyelashesHP:0200102
Inheritance

Autosomal recessive

Passed on when both parents carry the same gene change; often skips generations

Age of Onset

Infantile

Begins in infancy, roughly 1 month to 2 years old

Orphanet ↗OMIM ↗NORD ↗

Treatments

No FDA-approved treatments are currently listed for Pili torti-developmental delay-neurological abnormalities syndrome.

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No specialists are currently listed for Pili torti-developmental delay-neurological abnormalities syndrome.

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Treatment Centers

8 centers
🏥 NORD

Baylor College of Medicine Rare Disease Center

Baylor College of Medicine

📍 Houston, TX

🏥 NORD

Stanford Medicine Rare Disease Center

Stanford Medicine

📍 Stanford, CA

🔬 UDN

NIH Clinical Center Undiagnosed Diseases Program

National Institutes of Health

📍 Bethesda, MD

🔬 UDN

UCLA UDN Clinical Site

UCLA Health

📍 Los Angeles, CA

🔬 UDN

Baylor College of Medicine UDN Clinical Site

Baylor College of Medicine

📍 Houston, TX

🔬 UDN

Harvard/MGH UDN Clinical Site

Massachusetts General Hospital

📍 Boston, MA

🏥 NORD

Mayo Clinic Center for Individualized Medicine

Mayo Clinic

📍 Rochester, MN

👤 Mayo Clinic Center for Individualized Medicine

🏥 NORD

UCLA Rare Disease Day Program

UCLA Health

📍 Los Angeles, CA

Travel Grants

No travel grants are currently matched to Pili torti-developmental delay-neurological abnormalities syndrome.

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Community

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Caregiver Resources

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Questions for your doctor

Bring these to your next appointment

  • Q1.What specific tests can confirm this diagnosis, and should we pursue genetic testing?,How severe is my child's developmental delay, and what therapies do you recommend?,Does my child need anti-seizure medication, and what are the side effects?,Are there other conditions we should rule out, such as Menkes disease?,What is the expected long-term outlook for my child's development and independence?,How often should we schedule follow-up visits with each specialist?,Is there a risk that future children could have the same condition?

Common questions about Pili torti-developmental delay-neurological abnormalities syndrome

What is Pili torti-developmental delay-neurological abnormalities syndrome?

Pili torti-developmental delay-neurological abnormalities syndrome is an extremely rare genetic condition that combines unusual hair, delayed development, and problems with the nervous system. The name 'pili torti' refers to a specific hair abnormality where the hair shaft is flattened and twisted at irregular intervals, making the hair brittle, dry, and prone to breaking easily. Children with this syndrome typically show delays in reaching developmental milestones such as sitting, walking, and talking. Neurological problems can include seizures, low muscle tone (hypotonia), and intellectual d

How is Pili torti-developmental delay-neurological abnormalities syndrome inherited?

Pili torti-developmental delay-neurological abnormalities syndrome follows a autosomal recessive inheritance pattern. Genetic counseling can help families understand recurrence risk and testing options.

At what age does Pili torti-developmental delay-neurological abnormalities syndrome typically begin?

Typical onset of Pili torti-developmental delay-neurological abnormalities syndrome is infantile. Age of onset can vary across affected individuals.