Hi,
Regarding the question of whether OCT is more reliable or sensitive than ultrasound for detecting buried drusen, a group of us recently studied these modalities (and others) and published our results in AJO (PMID: 36516916).
To save you a few clicks, our results were: "The EDI-OCT had the highest sensitivity and accuracy (95%, 97%) to detect ODD, compared with FAF (84%, 92%), US (74%, 86%), and fundus photography (38%, 66%), respectively. All image modalities had high specificity (> 97%) and precision (> 93%). The EDI-OCT also had highest examiner confidence (96%) compared with all others (88%)."
So EDI-OCT appears to be the best test to detect ODD. If I recall, there were no ODD that were detected by ultrasound that were missed by EDI-OCT, but lots the other way around. You were asking about deep drusen, and we included both superficial and buried ODD in this study. Photos and FAF would probably not be as good for detecting deep ODD specifically, I would think.
One really nice advantage that EDI-OCT has over ultrasound is that it can not only DETECT drusen, but can also characterize them in really nice detail (shape, size, depth, number (single vs. conglomeration), relationship to adjacent tissues, presence of PHOMS or not, etc.) and allows you to follow the optic nerve head over time in a more standardized way than U/S. OCT can also allow you to measure interstitial edema in the RNFL (the "PHOMS-Up thickness", poster at the last NANOS; paper pending), which can probably help with distinguishing between papilledema (interstitial edema) and ODD pseudopapilledema (no interstitial edema).
Alex
Original Message:
Sent: 05-16-2025 09:07
From: Steven Kane
Subject: elevated optic discs
Hi Stephen,
Fair enough. 20/25+ OU, AOHRR 5/6 OU, normal pupil reactivities, attached fields not striking to my eyes. ARNFL 144 OU. The difference in colors between discs is photographic, not physiologic, at least for my direct ophthalmoscope. The question of arteriolar narrowing is not supported by direct visualization. They really look similar. The question of enhancement of posterior sclera OU is unanswered. I believe the LP was done with sedation according to mom. I wondered if sedation could have been waning as the closing pressure was measured, producing Valsava artifact. Curious if the group feels that OCT is more reliable or sensitive than sonography for detecting buried drusen. I've tended toward the latter for my patients who are nearly all children.
Steven
Original Message:
Sent: 05-15-2025 16:11
From: Stephen Pollock
Subject: elevated optic discs
It would be helpful to know the patient's visual parameters --- best-corrected acuity OU, color vision OU, and the results of formal perimetry OU, including images of the fields. It's not possible to evaluate the etiology of optic disc swelling (unilateral or bilateral) in the absence of this data.
The fundus photographs show two additional findings:
1) Moderate diffuse pallor of the swollen right optic disc. This may indicate some degree of progression into the atrophic stage of chronic disc swelling.
2) 2-3+ attenuation of all retinal arterioles in the right eye as well as the inferotemporal retinal arterioles in the left eye. This degree of diffuse arteriolar attenuation is particularly striking in view of the patient's age.
Stephen C. Pollock, MD
Original Message:
Sent: 5/15/2025 3:25:00 PM
From: Steven Kane
Subject: elevated optic discs
I've seen a thin 11 years old girl with elevated optic discs a few times during the past 3 months. Her optic disc appearances are unchanged from their appearances in the attached photos from November. Elevated optic disc appearances were first noticed during optometric examination 8 months ago while she was being evaluated for a very wide range of symptoms that began more than 1.5 years ago. Symptoms seem overall mild as judged by the absence of behavioral changes and include aches and pains involving pretty much every part of her body, joint popping, migrator muscle pains, chills, a bad taste in her mouth (before treatment with Diamox was given), GERD, perioral blisters, fatigue, and more. MRI/MRV c and s marred by motion artifact did not show a significant lesion or any classic signs of PTCS. The only sign to consider is some enhancement of posterior sclera on each side is difficult to understand in the absence of signs or symptoms of scleritis/uveitis. Buried drusen were found with sonography on each side.
The unsettling caveat is from the LP that was done when she presented to an ER before we met. An opening pressure was (attempted?) but not recorded. CSF composition including titers for many infectious processes (treponemes, viruses) was normal aside from an increased number of RBCs. In spite of my inquiries, an explanation for the absent OP was not offered. While an opening pressure was not recorded, a closing pressure was recorded and here's the rub: 35 cm water. What to make out of this isolated closing pressure?
Would you just repeat the LP? Or just follow her? I saw her yesterday and observed a happy kid with otherwise normal findings.
Thanks,
Steven Kane