Parkinsonism-hyperpyrexia syndrome following globus pallidus internus deep brain stimulation withdrawal: a report of two cases and literature review
This paper reports two cases of Parkinsonism-hyperpyrexia syndrome triggered by globus pallidus internus deep brain stimulation withdrawal, highlighting that while hyperthermia resolves rapidly upon device reactivation, creatine kinase levels remain elevated for days, necessitating continued biochemical monitoring to prevent premature de-escalation of care.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
Imagine your brain has a tiny, high-tech thermostat and a super-efficient traffic cop working together to keep your body running smoothly. For some people with Parkinson's disease, doctors install a special device called Deep Brain Stimulation (DBS) to act as that traffic cop, sending electrical signals to stop the brain's "traffic jams" that cause shaking and stiffness.
But what happens if the battery on that traffic cop suddenly dies, or the device gets turned off by accident? According to a new report from Kunming Medical University, the body can go into a terrifying panic mode called Parkinsonism-Hyperpyrexia Syndrome (PHS). Think of it like a car engine that suddenly revs to maximum speed while the cooling system breaks down. The patient gets stiff as a board, starts shaking uncontrollably, and their body temperature spikes dangerously high, sometimes reaching 39.5°C (that's over 103°F).
The researchers looked at two real-life stories to see what happens when this "traffic cop" goes offline.
The Two Stories
In the first story, a 67-year-old woman had her device accidentally turned off because the person charging it didn't finish the job properly. Within hours, she was burning up with a fever of 39.5°C, her heart was racing at 143 beats per minute, and her muscles were so stiff she couldn't move. Her blood showed a massive spike in a protein called creatine kinase (CK) at 2486 U/L, which is like a smoke alarm going off because her muscles were literally burning themselves up (a condition called rhabdomyolysis).
In the second story, a 71-year-old man went for an MRI scan at a different hospital. The staff didn't know how to safely turn off his DBS device for the scan, so it got shut down. He started feeling sick, with a fever of 38.2°C and new stiffness, but he was caught before things got as bad as the first woman.
The "Magic" Fix and the Tricky Trap
Here is the most surprising part. In both cases, the moment the doctors found out the device was off and turned it back on, the patients got better fast.
- The woman's fever dropped from 39.5°C to 37.8°C in just 4 hours.
- The man's fever dropped to 37.2°C in just 2 hours.
It felt like a miracle. But here is the trap the paper warns us about: The fever going down does not mean the danger is over.
The authors describe this as a "deceptive picture." Even though the patients' temperatures returned to normal almost instantly, the damage to their muscles was still healing. The woman's creatine kinase level (the smoke alarm) stayed high for 9 days, only dropping to normal levels after a week and a half of heavy IV fluids. The man's levels took 5 days to normalize.
Why does this happen?
The paper suggests that turning the device back on stops the "traffic jam" in the brain immediately. This stops the muscles from clamping down and generating that massive heat. So, the body cools down fast. However, the muscles that were already damaged are still leaking proteins into the blood, and it takes a long time for the kidneys to clean that up.
The Big Lessons
The paper argues against waiting around to check blood tests or run endless scans when a DBS patient gets sick. Instead, they suggest a "Device-first" rule: If a DBS patient gets stiff and hot, check the device immediately, just like you would check a patient's pulse or blood pressure.
They also point out a few ways this disaster could have been avoided:
- Better Handovers: In the first case, the device charging was handed off to a nurse who didn't finish the job. The paper suggests anyone handling these devices needs specific training.
- MRI Safety: In the second case, an outside hospital didn't check if the MRI was safe for the device. The paper notes this is a preventable risk.
- Don't Stop Too Soon: Because the fever goes away so fast, doctors might think the patient is cured and stop the IV fluids too early. The paper warns that this could lead to kidney trouble because the "smoke" (muscle damage) is still clearing out.
How sure are they?
The authors are very sure that turning the device back on fixes the fever quickly. They are also sure that the muscle damage takes much longer to heal. However, they admit that because they only looked at two specific cases involving a specific part of the brain (the globus pallidus internus, or GPi), they can't say for sure if this happens exactly the same way for all DBS patients. They suggest this pattern is real, but they need more studies to be 100% certain about the details.
In short: If a DBS patient gets hot and stiff, check the device now. But even if they stop shivering and their fever breaks, keep watching their blood work for days, because the real healing is just getting started.
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