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Living with Autosomal dominant Kenny-Caffey syndrome

A genetic condition that affects the skeleton, head, and eyes and causes frequent low blood calcium.

Understanding Autosomal dominant Kenny-Caffey syndrome

Autosomal dominant Kenny-Caffey syndrome (type 2) is a genetic disorder that affects the skeleton, head, and eyes.

It causes frequent episodes of low blood calcium (hypocalcemia). Other features include thick, dense bones, slow growth, small eyes with farsightedness, and a delay in skull bone and soft-spot closing. It starts in childhood.

Signs & symptoms

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

  • Low blood calcium from low parathyroid hormone
  • Short stature and slow growth
  • Small eyes and farsightedness
  • Thick, dense bones
  • Delayed skull bone formation
  • Dental cavities

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 bone and joint specialists, genetic specialists and hormone specialists.

  3. Consider genetic testing

    Changes in FAM111A 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
Bone and joint specialists (orthopedists or orthopedic surgeons); Genetic specialists (geneticists); Hormone specialists (endocrinologists)
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 rare disease patient organizations for support
  • 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
How are my calcium levels monitored and treated?
How often should my eyes be checked?
Would FAM111A testing help my relatives?

Quick facts

Symptoms usually startChild
InheritanceAutosomal Dominant
GenesFAM111A

GARD says changes in the FAM111A gene cause this condition. It is autosomal dominant, meaning one changed copy of the gene can be enough to cause it.

GeneticEndocrine

Also known as: dwarfism, cortical thickening of tubular bones and transient hypocalcemia; kcs2; kenny-caffey syndrome type 2; kenny-caffey syndrome, autosomal dominant; kenny-caffey syndrome, type 2

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Autosomal dominant Kenny-Caffey syndromeGARD ID 83 · 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 Autosomal dominant Kenny-Caffey syndrome.

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