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Living with X-linked mixed hearing loss with perilymphatic gusher

An X-linked hearing loss condition that worsens gradually and involves an ear bone difference that can cause fluid leaks during surgery.

Understanding X-linked mixed hearing loss with perilymphatic gusher

X-linked mixed hearing loss with perilymphatic gusher (DFNX2 or DFN3) is a genetic disorder that affects hearing.

It causes a gradual loss of hearing and a specific bone difference in the ear. GARD says this bone difference can cause a fluid leak during stapes surgery, an operation to improve hearing.

Signs & symptoms

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

  • Hearing loss from birth
  • Mixed hearing loss
  • Hearing loss that worsens over time
  • Widened inner ear canal
  • Stiffening of the stapes ear bone

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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
Could POU3F4 genetic testing confirm the diagnosis?
Is stapes surgery safe in my case?
Which hearing supports might help?

Quick facts

InheritanceX-Linked

This condition is caused by changes in the POU3F4 gene and follows X-linked inheritance. In some cases it is caused by deletions, inversions, or duplications in a region of the X chromosome.

Also known as: deafness, x-linked 2; dfnx2; dfnx2 nonsyndromic hearing loss and deafness; gusher syndrome; nance deafness; perilymphatic gusher-deafness syndrome

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · X-linked mixed hearing loss with perilymphatic gusherGARD ID 4504 · 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 X-linked mixed hearing loss with perilymphatic gusher.

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