SCDS
Superior Canal Dehiscence Syndrome
SCDS is an inner ear condition in which a small opening in the bone above one of the semicircular canals is present. This can cause symptoms such as dizziness from sound, pressure changes, or certain head movements.
Key points
- In SCDS, a small piece of bone above the superior semicircular canal is missing or thinner.
- This can make the balance system more sensitive to sound or pressure changes.
- Symptoms may include dizziness from loud sounds, straining, coughing, or sneezing.
- Some people hear their own body sounds, such as footsteps or eye movements.
- Physical therapy does not treat the cause itself but may help with residual instability.
Symptoms
- Dizziness from loud sounds.
- Dizziness from pressure changes, such as straining, coughing, or sneezing.
- A feeling of instability.
- Increased sensitivity to sound.
- Hearing one's own body sounds such as footsteps or eye movements.
Causes
- SCDS occurs because the bone above the superior semicircular canal is thinner or missing.
- Why this happens is not always clear. In some people the bone is thinner from birth; in others it may develop later.
Treatments
- Physical therapy usually does not focus on treating the cause of SCDS itself.
- For residual instability or balance problems, exercise therapy may sometimes help improve stability.
What is SCDS?
The vestibular organ is located in the inner ear and is surrounded by bone. In SCDS, a small piece of bone above the superior semicircular canal is missing, creating an additional opening.
This opening can make the balance system more sensitive to sound or pressure changes.
Inner ear
Opening in the bone
A small piece of bone above the semicircular canal is missing.
Sound
Sensitivity to sound
Loud sounds can trigger dizziness.
Pressure
Pressure changes
Straining, coughing, or sneezing can cause symptoms.
How is SCDS diagnosed?
The diagnosis of SCDS is usually made by an ENT specialist. This is based on the symptom pattern, hearing tests, vestibular tests, and imaging of the inner ear.
During a physical therapy assessment, certain symptoms or reactions may be noted that warrant further investigation by a specialist.
Would you like to have your symptoms assessed?
An initial assessment can help determine whether your symptoms fit SCDS and which next steps may be appropriate.