Microcephalic Primordial Dwarfism Due To Znf335 Deficiency C3554499
A rare genetic disorder causing severe microcephaly and primordial dwarfism due to ZNF335 gene mutations. Presents at birth; treatment is supportive and prognosis varies.
Key facts at a glance
- ICD-10
- G40.909
- ICD-11
- 8A00.0
- Body system
- neurologic
- Severity
- severe
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Seizures
Generalized symptoms
(neurologic)Significant symptoms that substantially affect daily functioning.
Frequency: Common at all stages
Severe microcephaly
(neurologic)Profound developmental delay
(neurologic)Facial dysmorphism
(neurologic)Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Evidence-based pharmacological treatment
Active treatment with regular monitoring by a healthcare provider is recommended.
Neurodevelopmental Surveillance
Regular neurological examinations and developmental assessments to track cognitive progression, identify seizure activity, and monitor for progressive neurological decline.
Early Intervention Therapy
Intensive early childhood physical and occupational therapy to maximize motor function, address hypotonia, and support achievement of developmental milestones.
Additional treatment options
Seizure Management
Anticonvulsant therapy when seizures are present, with careful selection based on seizure type and potential drug interactions in this complex patient population.
medicationCognitive Support Services
Educational support, speech therapy, and cognitive interventions tailored to the specific learning profile associated with ZNF335-related microcephaly.
psychologicalFeeding and Nutrition Management
Nutritional assessment and support addressing feeding difficulties, potential swallowing dysfunction, and metabolic needs specific to individuals with syndromic microcephaly.
dietaryWhen to seek medical help
Recognize when you need immediate medical attention.
See a doctor within 24 hours
Moderate to severe symptoms that may indicate worsening of this condition. Prompt medical evaluation is recommended.
Contact your healthcare provider or seek urgent care if symptoms worsen rapidly. Go to the emergency department for life-threatening symptoms.
Frequently asked questions
Common questions about this topic.
What is Microcephalic Primordial Dwarfism Due To Znf335 Deficiency C3554499?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy