Papilledema

Symptoms

• headache: often positional, worse in the morning or with valsalva
• transient visual obscurations (tvo): seconds-long graying/blackout of vision
• pulsatile tinnitus: "whooshing" sound synchronous with heartbeat
• binocular horizontal diplopia: indicates cn vi palsy (false-localizing sign)
• systemic: nausea, vomiting, or radicular back pain (spinal sheath dilation)
• screening hx: ask about weight gain, tetracyclines, vitamin a/retinoids, or ocp use

Clinical Findings

Clinical signature

• bilateral disc swelling with blurred margins and vessel obscuration
• frisén scale (grade 0–5): quantifies severity based on vessel obscuration
• paton lines: circumferential retinal folds temporal to the disc
• absence of spontaneous venous pulsations (svp): suggests icp >200 mmh₂o

Hemorrhagic/exudative

• peripapillary flame hemorrhages and cotton-wool spots
• disc hyperemia (acute) or gray/atrophic appearance (chronic)

Functional changes

• enlarged blind spot: earliest change on formal perimetry
• visual acuity: often 20/20 initially; central vision is the LAST to go

Etiology

Idiopathic intracranial hypertension (IIH)

• classically affects obese women of reproductive age (f:m ratio 9:1)

Secondary causes

• intracranial mass (tumor, abscess, hematoma)
• cerebral venous sinus thrombosis (cvst): suspect in postpartum or ocp users
• meningitis: bacterial, tb, fungal, or neoplastic

Medication-induced

• tetracyclines, isotretinoin/vitamin a, growth hormone, and steroid withdrawal

Red Flags

• rapid vision loss (fulminant iih): can progress to blindness over days
• focal neurologic signs: suggests an intracranial mass rather than iih
• fever + altered mental status: suggests infectious meningitis or abscess
• pregnancy + bilateral disc swelling: mandate urgent mrv to rule out cvst

Investigations

Vital signs (mandatory)

• blood pressure: rule out malignant hypertension (can mimic papilledema)

Imaging (urgent)

• mri brain + mrv with gadolinium: gold standard to rule out mass and cvst
• ct head: if mri is unavailable (rules out hemorrhage/large mass/hydrocephalus)

Lumbar puncture (LP)

• opening pressure: >25 cmh₂o in adults confirms raised icp (perform ONLY after imaging)

Ocular monitoring

• oct rnfl: quantifies edema and monitors treatment response
• automated perimetry (hvf 24-2): crucial for identifying early field loss

Treatment

Medical (IIH)

• acetazolamide (first-line): titrated up to 1–2 g/day (as per iihtt trial)
• weight loss: the cornerstone of long-term remission in iih
• topiramate: useful adjunct (weight loss benefit + migraine prophylaxis)

Surgical (if medical fails)

• optic nerve sheath fenestration: for progressive vision loss
• csf shunting (vp/lp): preferred if refractory headache is the primary symptom
• venous sinus stenting: for confirmed transverse sinus stenosis with gradient

Clinical Pearl

frisén grading 0–5 scales disc swelling severity. spontaneous venous pulsations (svp) present → icp likely <200 mmh₂o. oct rnfl + subfoveal fluid is the current monitoring standard for treatment response. in iih, visual loss — not headache — drives escalation to surgical management.

Differential Diagnosis

• • pseudopapilledema (optic disc drusen): no leakage on ivfa, visible on b-scan
• • naion: typically unilateral, sectoral swelling in older adults
• • malignant hypertension: systolic >180; check blood pressure!
• • papillitis (optic neuritis): associated with rapd and significant vision loss

Related Signs Conditions

• Adie (Tonic) Pupil
• Angioid Streaks
• Argyll Robertson Pupils
• Cotton–Wool Spot
• Horner Syndrome
• Leukocoria
• Subconjunctival Hemorrhage