Q85.02
Neurofibromatosis, type 2
Clinical Classification Guidelines
Inclusion Terms
- Acoustic neurofibromatosis
Medical Intelligence & Overview
Neurofibromatosis Type 2 (NF2) is a genetic disorder that primarily causes benign tumors to grow on the nerves responsible for hearing and balance, particularly the vestibulocochlear nerve. Recognized under the ICD-10 code Q85.02, it is a closely related condition to Neurofibromatosis Type 1 but features distinct symptoms and tumor locations. Often called acoustic neurofibromatosis, NF2 can lead to hearing loss, balance difficulties, and other neurological problems. It typically manifests in late adolescence or early adulthood and requires ongoing medical management to address its symptoms and complications.
Causes & Symptoms
Clinical Causes: N F 2 i s c a u s e d b y m u t a t i o n s i n t h e N F 2 g e n e , w h i c h p r o d u c e s a p r o t e i n c a l l e d m e r l i n o r s c h w a n n o m i n t h a t s u p p r e s s e s t u m o r g r o w t h . W h e n t h i s g e n e i s a l t e r e d , c e l l s i n t h e n e r v o u s s y s t e m , e s p e c i a l l y S c h w a n n c e l l s , c a n g r o w u n c o n t r o l l a b l y , f o r m i n g t u m o r s . M o s t c a s e s o f N F 2 a r e i n h e r i t e d i n a n a u t o s o m a l d o m i n a n t p a t t e r n , m e a n i n g a s i n g l e c o p y o f t h e f a u l t y g e n e f r o m a n a f f e c t e d p a r e n t c a n c a u s e t h e d i s o r d e r . H o w e v e r , a b o u t h a l f o f c a s e s r e s u l t f r o m n e w m u t a t i o n s w i t h n o p r i o r f a m i l y h i s t o r y .
Key Symptoms: Hearing loss, typically gradual and affecting one or both ears Tinnitus, or ringing in the ears Unsteady balance and difficulty walking Facial numbness or weakness Headaches or dizziness Visual disturbances, such as blurred or double vision Muscle weakness or numbness in limbs Weakness or numbness around the face
Diagnostic & Treatment
Diagnosis Path: Diagnosis of NF2 involves a combination of clinical assessments and imaging studies. Key tools include:
Treatment Protocols: While there is no cure for NF2, various treatments aim to manage symptoms and prevent complications:
Clinical Advice & FAQs
Billing Guidance
Is Q85.02 a billable ICD-10 code?
Yes, Q85.02 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report Q85.02?
Clinical documentation must specify the nature of Neurofibromatosis, type 2 and any associated comorbidities for accurate reporting.
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