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Living with Neurogenic scapuloperoneal syndrome, Kaeser type

A rare inherited nerve and muscle condition with weakness in the shoulder and lower leg muscles that starts in adulthood.

Understanding Neurogenic scapuloperoneal syndrome, Kaeser type

Neurogenic scapuloperoneal syndrome, Kaeser type, is a rare inherited nerve and muscle condition that starts in adulthood.

People have muscle weakness and wasting that affects the shoulder and lower leg muscles (scapuloperoneal pattern). Facial muscles are mildly affected. Other findings include trouble swallowing and enlarged breast tissue in men (gynecomastia). Blood tests show a high level of the muscle enzyme CK.

Signs & symptoms

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

  • Weakness in the shoulder and lower leg muscles
  • Wasting of the shoulder muscles
  • Enlarged breast tissue in men (gynecomastia)
  • Foot drop (less common)
  • Trouble swallowing (less common)
  • Mild weakness in the face (less common)

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 brain and nervous system specialists and genetic specialists.

  3. Consider genetic testing

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

  4. Connect with expert centers

    Muscular Dystrophy Association may keep lists of experts for this condition.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Expert lists: Muscular Dystrophy Association
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 Muscular Dystrophy Association
  • 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 DES gene?
Should my heart be checked as part of my care?
How should swallowing be checked?

Quick facts

Symptoms usually startAdult
InheritanceAutosomal Dominant
GenesDES

GARD lists changes in the DES gene. The condition is autosomal dominant, which means one changed copy of the gene can be enough to cause it.

GeneticNeurological

Also known as: kaeser syndrome; neurogenic scapuloperoneal syndrome kaeser type; scpnk; stark kaeser syndrome; stark-kaeser syndrome

Patient organizations

Source: NIH GARD · Neurogenic scapuloperoneal syndrome, Kaeser typeGARD ID 10312 · 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 Neurogenic scapuloperoneal syndrome, Kaeser type.

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