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Living with RIN2 syndrome

A very rare inherited connective tissue condition with a large head, thin hair, loose skin, loose joints, and scoliosis.

Understanding RIN2 syndrome

RIN2 syndrome is a very rare inherited connective tissue condition. It was formerly known as MACS syndrome.

Features include a large head (macrocephaly), sparse scalp hair, soft, stretchy skin, very flexible joints, and scoliosis. Facial features slowly become coarser. Other features can include gum overgrowth and uneven teeth. It begins in the newborn and infant period.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Large head and coarse facial features
  • Loose, stretchy, saggy skin
  • Very flexible joints
  • Gum overgrowth and uneven teeth
  • Easy bruising
  • High-pitched voice

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include autoimmune and inflammatory disease specialists, bone and joint specialists, brain and nervous system specialists and digestive system specialists.

  3. Consider genetic testing

    Changes in RIN2 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
autoimmune and inflammatory disease specialists (rheumatologists); Bone and joint specialists (orthopedists or orthopedic surgeons); Brain and nervous system specialists (neurologists); Digestive system specialists (gastroenterologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with Children's Skin Disease Foundation
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Should we have genetic testing for the RIN2 gene?
How should the spine and joints be monitored?
Does dental or gum care need special attention?

Quick facts

Symptoms usually startNewborn and as an Infant
InheritanceAutosomal Recessive
GenesRIN2

It is caused by changes in the RIN2 gene. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

GeneticNeurologicalGastrointestinalSkin

Also known as: macrocephaly-alopecia-cutis laxa-scoliosis syndrome; macrocephaly, alopecia, cutis laxa, scoliosis syndrome; macs (macrocephaly, alopecia, cutis laxa, scoliosis) syndrome; macs syndrome; rin2 deficiency; tall forehead-sparse hair-skin hyperextensibility-scoliosis syndrome

Patient organizations

Broader rare-disease groups

Source: NIH GARD · RIN2 syndromeGARD ID 17120 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with RIN2 syndrome.

Explore the RIN2 syndrome blog

Explore research for RIN2 syndrome

Explore actively recruiting RIN2 syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for RIN2 syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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