Can a patient with vestibular paroxysmia experience brief positional vertigo lasting seconds and also have Mal de Débarquement syndrome (MdDS)?

Can Vestibular Paroxysmia Present with Brief Positional Vertigo and Coexist with MdDS?

Yes, vestibular paroxysmia can present with brief positional vertigo lasting seconds and can coexist with Mal de Débarquement syndrome (MdDS), though this represents an atypical presentation that requires careful diagnostic evaluation to distinguish from BPPV.

Understanding the Clinical Overlap

Vestibular paroxysmia (VP) classically presents with spontaneous brief vertigo attacks lasting seconds to minutes, but recent evidence demonstrates it can mimic positional vertigo. A 2026 case report documented VP presenting with direction-changing apogeotropic horizontal nystagmus on supine roll testing—findings typically associated with BPPV 1. This challenges the traditional view that VP attacks are exclusively spontaneous.

The key distinguishing features are:

Vestibular Paroxysmia Characteristics:

• Attack duration: Seconds to minutes (typically <1 minute)
• Frequency: Multiple attacks per day (often 10-30+)
• Triggers: Can be spontaneous OR positional, plus hyperventilation
• Associated symptoms: Unilateral tinnitus, hyperacusis, or hemifacial spasm
• Response: Dramatic improvement with carbamazepine/oxcarbazepine 2

BPPV Characteristics (for comparison):

• Attack duration: Seconds to <1 minute
• Triggers: Obligate positional changes
• Pattern: Triggered episodic vestibular syndrome 3
• No auditory symptoms or hemifacial involvement

The MdDS Connection

MdDS can coexist with vestibular paroxysmia, and this association is well-documented. A 2025 Russian study found that among patients with MdDS, 38.9% had comorbid vestibular paroxysmia, making it the most common associated vestibular disorder 4. This same study noted that MdDS patients had the highest rate of developing Persistent Postural Perceptual Vertigo (PPPV) as a complication.

MdDS presents with:

• Continuous rocking/swaying/bobbing sensations
• Typically triggered by passive motion exposure (boat, car, plane)
• Can also occur from non-motion triggers (neck injury, inflammation)
• Symptoms paradoxically improve with re-exposure to motion 5, 6

Diagnostic Algorithm

When evaluating a patient with brief positional vertigo who may have VP with MdDS:

1. Characterize the vertigo pattern:

   • If attacks occur >10 times daily with auditory symptoms → suspect VP
   • If purely positional with <1 minute duration → consider BPPV vs. VP
   • If continuous rocking/swaying between attacks → suspect comorbid MdDS

2. Perform positional testing:

   • Dix-Hallpike and supine roll tests
   • Note: VP can produce positional nystagmus resembling BPPV 1
   • Look for atypical features: direction-changing apogeotropic nystagmus, associated tinnitus during testing

3. Assess for VP-specific features:

   • Unilateral auditory symptoms (tinnitus, hyperacusis)
   • Hemifacial spasm or twitching
   • Hyperventilation-induced nystagmus
   • Very high attack frequency (multiple per day)

4. Obtain high-resolution MRI:

   • 3D-CISS or FIESTA sequences of cerebellopontine angle
   • Look for neurovascular contact between CN VII/VIII and AICA
   • Mandatory to distinguish classical VP (neurovascular compression) from secondary VP (mass lesion) 2

5. Therapeutic trial:

   • This is the most reliable diagnostic test for VP 2
   • Start carbamazepine 200 mg/day or oxcarbazepine
   • VP responds dramatically within days to 2 weeks 1, 7
   • BPPV does not respond to these medications

Critical Pitfalls to Avoid

Do not assume all brief positional vertigo is BPPV. The 2017 BPPV guidelines emphasize that BPPV fits the "triggered episodic vestibular syndrome" with episodes lasting <1 minute 3. However, VP can present identically, and the distinction requires:

• Assessment of attack frequency (VP has many more attacks daily)
• Evaluation for auditory symptoms (present in VP, absent in BPPV)
• Therapeutic response (VP responds to sodium channel blockers)

Do not miss the MdDS component. If the patient describes continuous rocking/swaying sensations between discrete vertigo attacks, this suggests MdDS as a comorbid or complicating condition. MdDS associated with VP may indicate a more complex vestibular pathology requiring multimodal treatment 4.

Do not rely solely on imaging. While neurovascular contact on MRI supports VP diagnosis, its absence does not exclude it (idiopathic VP). The beneficial response to carbamazepine remains the most reliable clinical sign 2.

Treatment Approach

For VP with positional features:

• First-line: Carbamazepine 200-400 mg/day or oxcarbazepine 300-600 mg/day
• Alternative: Lacosamide if carbamazepine not tolerated
• Expected response: Complete or near-complete resolution within 2 weeks 1, 2

For comorbid MdDS:

• Clonazepam for symptomatic relief 6
• Consider SSRIs for persistent symptoms
• Vestibular rehabilitation may help
• Note: MdDS symptoms may persist even after VP is controlled

If symptoms persist despite carbamazepine, reconsider the diagnosis—you may be dealing with BPPV, vestibular migraine (which can also mimic both conditions 8), or another etiology entirely.