A small, preliminary study looked at a rare nerve disorder called anti-NF155 antibody-positive nodopathy. Researchers studied seven male patients with this condition. They used a special brain scan called a perfusion SPECT to measure blood flow in the cerebellum, a part of the brain involved in movement control.
The main finding was that six out of the seven patients (86%) showed reduced blood flow, or hypoperfusion, in their cerebellum. All seven patients had experienced tremor at some point during their illness. The study did not find a link between the reduced blood flow and how long a patient had been sick or their age. The research did not report on any safety concerns related to the scans.
It is very important to be careful with these results. This was a very small study that looked back at existing patient records, not a forward-looking trial. The authors themselves say the findings are descriptive and meant to generate ideas for future research, not to prove a cause. A much larger study is needed to confirm if this reduced blood flow is a real feature of the disease and what it might mean for patients.
Readers should understand this as an early observation in a very specific group of patients. It does not change how the disease is diagnosed or treated at this time. The finding points scientists toward the cerebellum as an area to study more closely in this rare condition.