Diagnostic Code 8913 · 38 CFR §4.124a
Diencephalic epilepsy is a rare seizure disorder originating from the diencephalon — a deep brain structure that includes the thalamus and hypothalamus. These seizures produce unusual symptoms that can mimic autonomic nervous system dysfunction, including sudden episodes of flushing, sweating, rapid heart rate, blood pressure changes, pupil dilation, and altered consciousness. Veterans may develop this type from traumatic brain injuries affecting deep brain structures, brain tumors, or infections that damage the diencephalon during service. Because the symptoms can look like panic attacks or cardiac events, diencephalic epilepsy is often misdiagnosed for years.
| Rating | Criteria |
|---|---|
| 100% | |
| 80% | |
| 60% | |
| 40% | |
| 20% | |
| 10% |
EEG with deep electrode monitoring if available, showing diencephalic seizure activity, Brain MRI showing lesions or changes in the thalamus or hypothalamus region, Autonomic function testing during episodes, Detailed seizure diary documenting the autonomic symptoms during each episode, Neurologist's diagnosis differentiating these from panic attacks or cardiac events, Service records documenting TBI or brain condition causing diencephalic damage