Case 14 - Neuro-ophthalmology, orbit, and inflammation

Severe Headaches and Bilateral Disc Edema

20-year-old obese woman - Severe headaches x weeks - No ocular symptoms - Bilateral papilledema found

Illustrated eye for pathology case review

Case 14Idiopathic Intracranial Hypertension

Clinical Presentation

A 20-year-old obese woman has experienced severe headaches for several weeks, but has no ocular symptoms. The photograph depicts the fundus appearance in both eyes.

Learner Questions

Describe the ophthalmoscopic findings.
What is your plan for further diagnostic evaluation?
What is the differential diagnosis?

Answer Framework

Findings

Bilateral PAPILLEDEMA: disc elevation with 360 degrees blurred margins, obscuration of disc surface vessels, peripapillary flame hemorrhages, Paton's lines (concentric retinal folds from CSF displacement), +/- cotton-wool spots. Macula and peripheral retina normal. Papilledema = disc swelling specifically from elevated ICP (not other causes of disc edema).

Diagnostic plan

Step 1: MRI brain + MRV (rule out mass lesion and venous sinus thrombosis - BEFORE LP). IIH MRI findings: empty sella, posterior globe flattening, optic nerve sheath distension, transverse sinus stenosis. Step 2: LP (lateral decubitus) - opening pressure >25 cmH₂O + NORMAL CSF analysis (cells, protein, glucose) = required. Step 3: labs - thyroid function, medication review (tetracyclines, isotretinoin, OCP, steroid withdrawal).

DDx for bilateral papilledema

IIH (diagnosis of exclusion): Intracranial mass (tumor/abscess/hematoma - CT/MRI required), Cerebral venous sinus thrombosis (OCP, hypercoagulable - MRV; can perfectly mimic IIH), Hypertensive emergency (check BP immediately!), Meningitis/encephalitis (fever, meningismus, CSF pleocytosis), Hydrocephalus (enlarged ventricles on CT/MRI).

Teaching Pearl

IIH classic: young obese woman + bilateral papilledema + LP opening pressure >25 cmH₂O + normal MRI + NORMAL CSF. Associated medications: tetracyclines (doxycycline!), isotretinoin, OCP, steroid withdrawal. Treatment: weight loss (most effective long-term), acetazolamide (IIHTT trial), ONSF or CSF shunt if vision threatened. Monitor visual fields - permanent loss in ~10% if undertreated.

Original answer transcript

Findings
Bilateral PAPILLEDEMA: disc elevation with 360 degrees blurred margins, obscuration of disc surface vessels, peripapillary flame hemorrhages, Paton's lines (concentric retinal folds from CSF displacement),
+/- cotton-wool spots. Macula and peripheral retina normal. Papilledema = disc swelling specifically from elevated ICP (not other causes of disc edema).
Diagnostic plan
Step 1: MRI brain + MRV (rule out mass lesion and venous sinus thrombosis - BEFORE LP). IIH MRI findings: empty sella, posterior globe flattening, optic nerve sheath distension, transverse sinus
stenosis. Step 2: LP (lateral decubitus) - opening pressure >25 cmH₂O + NORMAL CSF analysis (cells, protein, glucose) = required. Step 3: labs - thyroid function, medication review (tetracyclines,
isotretinoin, OCP, steroid withdrawal).
DDx for bilateral papilledema
IIH (diagnosis of exclusion): Intracranial mass (tumor/abscess/hematoma - CT/MRI required), Cerebral venous sinus thrombosis (OCP, hypercoagulable - MRV; can perfectly mimic IIH),
Hypertensive emergency (check BP immediately!), Meningitis/encephalitis (fever, meningismus, CSF pleocytosis), Hydrocephalus (enlarged ventricles on CT/MRI).
TEACHING PEARL
IIH classic: young obese woman + bilateral papilledema + LP opening pressure >25 cmH₂O + normal MRI + NORMAL CSF. Associated medications: tetracyclines
(doxycycline!), isotretinoin, OCP, steroid withdrawal. Treatment: weight loss (most effective long-term), acetazolamide (IIHTT trial), ONSF or CSF shunt if vision
threatened. Monitor visual fields - permanent loss in ~10% if undertreated.