





Title: 25M — Incidental 2 mm left cavernous ICA aneurysm on CTA. Prior CTA said no aneurysm. True aneurysm vs normal contour?
First 3 images are Jan 3rd
Last 3 images are June 30th
Age: 25
Sex: Male
Height: 5’9”
Weight: ~247 lb
Location: Utah, USA
Smoking/vaping: I vape/use nicotine. Previously used a lot of caffeine/energy drinks but have mostly stopped/reduced.
Relevant medical history: Juvenile nasopharyngeal angiofibroma/JNA as a teenager, treated in 2017 with right-sided sinonasal/skull-base surgery and pre-op embolization. Mild obstructive sleep apnea.
Current issue: Incidental possible aneurysm found during a CTA head/neck done for right-sided numbness/altered sensation.
Main question:
On 6/30/2026, I had a CTA head/neck at University of Utah during a stroke-type workup for right-sided face/arm/foot altered sensation. The CTA report noted an incidental **2 mm broad-based left cavernous ICA aneurysm**, laterally directed. The same report said there was **no large-vessel occlusion, no intracranial stenosis, no extracranial stenosis, no carotid plaque/stenosis, and no dissection**.
The same day, I had an MRI brain that showed **no acute infarct, no hemorrhage, no mass, and no acute intracranial pathology**.
What makes me confused is that I also had a CTA head/neck on 1/3/2026 at Brigham City Community Hospital, and that report said **no aneurysm, no stenosis, and no occlusion**. When I look at the images myself, I can see a small contour/bulge in what looks like the same left cavernous ICA region, but I can’t tell whether it is a true aneurysm, a normal carotid siphon/cavernous ICA contour, or something borderline.
Relevant imaging/history:
- 2017 diagnostic cerebral angiogram/embolization for right JNA: as far as I understand, no aneurysm was reported at that time.
- 1/3/2026 CT brain: no acute intracranial abnormality.
- 1/3/2026 CTA head/neck: report said no aneurysm, stenosis, or occlusion.
- 6/30/2026 CTA head/neck: reported **2 mm broad-based left cavernous ICA aneurysm**, laterally directed. Otherwise no LVO, stenosis, carotid plaque, or dissection.
- 6/30/2026 MRI brain: no acute infarct, hemorrhage, mass, or acute intracranial pathology.
Blood pressure concern:
I regularly check my blood pressure. Because I’m having symptoms often, my BP readings are usually elevated unless I am completely at rest. During episodes, it tends to spike around **155/105**, then as the episode wears off and I’m resting, it comes down closer to **115/75**. I’m trying to understand whether these temporary spikes matter much for a tiny cavernous ICA aneurysm, or whether the main concern is long-term average BP and whether the aneurysm is truly cavernous/stable.
Symptoms:
My symptoms are mostly right-sided altered sensation in my face/hand/foot, but the aneurysm finding is on the **left** cavernous ICA. I’m assuming it may be incidental, but I’m not sure.
What I’m hoping to understand:
- Does a **2 mm broad-based left cavernous ICA aneurysm** generally sound low risk if it is fully cavernous/extradural?
- How often can a tiny cavernous ICA “aneurysm” actually be normal vessel contour/carotid siphon anatomy?
- Could the January CTA have missed it or just not reported it?
- Should I ask for a neurovascular radiologist to compare the actual January and June CTA source images/MIPs/3D reconstructions side-by-side?
- Would MRA surveillance be enough, or would DSA/catheter angiogram ever be used to clarify true aneurysm vs contour?
- Do temporary BP spikes during symptoms make this more concerning, or is sustained hypertension the bigger issue?
- What follow-up interval is usually recommended for something this small if confirmed?