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PubMed This is a summary of 41 peer-reviewed journal articles Updated
Neurology · Chronic Lymphocytic Inflammation with Pontine Perivascular Enhancement Responsive to Steroids

CLIPPERS: A Patient Guide

At a Glance

CLIPPERS is a rare inflammatory condition affecting the brainstem that often improves with steroids but can resemble disorders such as lymphoma. Diagnosis requires MRI, spinal fluid testing, and sometimes biopsy to rule out mimics, while long-term treatment and monitoring may reduce relapse risk.

CLIPPERS is a rare and complex inflammatory condition that affects the central nervous system, predominantly targeting the brainstem—the vital area at the base of the brain that controls many of the body’s automatic functions [1][2]. The name is an acronym for Chronic Lymphocytic Inflammation with Pontine Perivascular Enhancement Responsive to Steroids [3]. Because it was only formally identified in 2010, receiving this diagnosis often means joining a small global community of patients and researchers who are still uncovering the intricacies of the disease [1][4].

The condition typically manifests through subacute symptoms, meaning they develop gradually over several weeks rather than appearing instantly [5][6]. Many patients experience pontocerebellar issues, which include a loss of balance or coordination (ataxia), double vision (diplopia), and slurred speech (dysarthria) [2][7]. In the leading pathological model, these symptoms occur because your immune system’s T-cells inappropriately gather around the small blood vessels in the pons, causing inflammation that disrupts the relay of signals [1][8]. However, the exact trigger for this immune response remains uncertain.

One of the defining features of CLIPPERS is how remarkably well it responds to steroid medications [1][5]. For many people, high-dose steroids quickly resolve the inflammation and significantly improve physical symptoms [2][9]. However, this responsiveness is also why doctors must be extremely cautious; several other serious conditions, such as primary CNS lymphoma or autoimmune diseases like MOG-antibody disease, can initially look like CLIPPERS and even temporarily improve on steroids [5][10]. This makes CLIPPERS a diagnosis of exclusion, requiring your medical team to carefully rule out “mimics” through detailed MRIs, spinal fluid analysis, and sometimes a brain biopsy [1][10].

Living with CLIPPERS involves an individualized commitment to careful monitoring and medication management. Because the disease often relapses if steroids are lowered too quickly or stopped, long-term care is usually required [3][7]. To avoid the side effects of prolonged high-dose steroids, many patients transition to “steroid-sparing” maintenance therapies, such as methotrexate, to help keep the immune system stable [3][10]. Regular follow-up scans and clinical exams are essential to ensure the diagnosis remains accurate and the treatment effective [5][11]. While the journey with a rare disease can feel uncertain, many adults with CLIPPERS can achieve a stable and favorable long-term outcome with the right combination of expert care and consistent surveillance [3][12].

In this guide

6 chapters

01

Orientation to CLIPPERS: What It Is and How It Works

Learn what CLIPPERS is, why it causes brainstem inflammation, who it affects, how MRI findings and steroids help, and what your diagnosis may mean for you.

02

Symptoms and Emergency Warning Signs

Learn the common symptoms of CLIPPERS, how they may progress, and which breathing, swallowing, speech, or consciousness changes need emergency care now.

03

Diagnosis: MRI Patterns, Spinal Fluid, and Pathology

Learn how CLIPPERS is diagnosed using MRI patterns, spinal fluid tests, steroid response, and brain biopsy—and what “definite” or “probable” means for you.

04

The Challenge of Mimics and Diagnostic Warning Signs

Learn which conditions can mimic CLIPPERS, why steroid response is not diagnostic, and which MRI, spinal fluid, and exam warning signs may prompt reassessment.

05

Treatment Strategy and Relapse Management

Learn how CLIPPERS treatment uses IV and oral steroids, gradual tapering, relapse warning signs, steroid-sparing medicines, and long-term safety monitoring.

06

Monitoring, Follow-up, and Long-Term Care

Learn how CLIPPERS follow-up uses exams and MRI scans, manages steroid tapering, monitors relapse or mimics, and supports rehabilitation and long-term recovery.

Common questions in this guide

What is CLIPPERS, and where does it occur?
CLIPPERS is a rare inflammatory disorder of the central nervous system, especially the pons in the brainstem. Immune cells are thought to collect around small blood vessels there, disrupting nerve signals. The exact trigger is not known.
What symptoms might CLIPPERS cause?
Symptoms usually develop over several weeks rather than all at once. Common problems include loss of balance or coordination, double vision, and slurred speech; some people may also have swallowing difficulties.
How do doctors diagnose CLIPPERS?
CLIPPERS is usually a diagnosis of exclusion, meaning clinicians first rule out other disorders with similar symptoms or MRI findings. Evaluation may include brain MRI, spinal fluid testing, and sometimes a brain biopsy. Conditions such as primary central nervous system lymphoma and MOG-antibody disease can temporarily improve with steroids, so steroid response alone does not confirm CLIPPERS.
Does improving with steroids prove that I have CLIPPERS?
No. CLIPPERS often improves quickly with high-dose steroids, but several other serious conditions can also improve temporarily after steroids. Doctors use imaging, spinal fluid results, clinical findings, and sometimes biopsy to make the diagnosis.
Why might I need treatment after my symptoms improve?
Symptoms and inflammation can return if steroids are reduced too quickly or stopped, so many people need long-term follow-up and medication planning. A steroid-sparing medicine such as methotrexate may help maintain control while reducing exposure to prolonged high-dose steroids. The choice and timing should be individualized by the treating team.
What should I expect from long-term CLIPPERS monitoring?
Follow-up usually includes regular clinical examinations and brain scans to check for recurrent inflammation and to make sure the diagnosis and treatment remain appropriate. Many adults can have a stable, favorable long-term outcome with expert care and consistent surveillance, although relapse remains possible.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Does my MRI show the typical punctate pattern, and what other conditions were considered before arriving at this diagnosis?
  2. 2.Given that CLIPPERS is a diagnosis of exclusion, what specific tests (like spinal fluid or biopsy) are most important for my specific case?
  3. 3.What is our long-term plan for a 'steroid-sparing' medication to help me reduce my prednisone dose safely?
  4. 4.If I experience a return of symptoms during my taper, how quickly can we perform a clinical exam or repeat scan to check for new inflammation?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (12)
  1. 1

    Diagnostic criteria for chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids (CLIPPERS).

    Tobin WO, Guo Y, Krecke KN, et al.

    Brain : a journal of neurology 2017; (140(9)):2415-2425 doi:10.1093/brain/awx200.

    PMID: 29050399
  2. 2

    Chronic Lymphocytic Inflammation With Pontine Perivascular Enhancement Responsive to Steroids Presenting With Predominantly Neuro-Ophthalmic Features.

    McDonald HM, Handzic A, Mandell DM, et al.

    Journal of neuro-ophthalmology : the official journal of the North American Neuro-Ophthalmology Society 2025; (45(4)):460-465 doi:10.1097/WNO.0000000000002271.

    PMID: 39774846
  3. 3

    Therapeutic Approaches in CLIPPERS.

    Taieb G, Allou T, Labauge P

    Current treatment options in neurology 2017; (19(5)):17 doi:10.1007/s11940-017-0455-4.

    PMID: 28386850
  4. 4

    Exploring the Intersection of Isolated-CNS Hemophagocytic Lymphohistiocytosis and Pediatric Chronic Lymphocytic Inflammation With Pontine Perivascular Enhancement Responsive to Steroids.

    Debinski C, Goergen S, McLean C, et al.

    Journal of child neurology 2021; (36(11)):935-942 doi:10.1177/08830738211009654.

    PMID: 34056941
  5. 5

    Chronic lymphocytic inflammation with pontine perivascular enhancement responsive to steroids (CLIPPERS): contemporary advances and current controversies.

    Li EC, Lai QL, Cai MT, et al.

    Journal of neurology 2024; (271(4)):1747-1766 doi:10.1007/s00415-024-12189-4.

    PMID: 38286842
  6. 6

    Two New Cases and Literature Review of CLIPPERS Syndrome with Long-Term Follow-up.

    Kamişli Ö, Tecellioğlu M, Erbay MF, et al.

    Noro psikiyatri arsivi 2020; (57(2)):160-164 doi:10.5152/npa.2017.22732.

    PMID: 32550784
  7. 7

    Increased Number of Perivascular CD20-Positive B Lymphocytes in the Neuropathology of CLIPPERS: Findings of 6 Patients from Mainland China.

    Yang B, Liu F, Li J, Wen Y

    European neurology 2021; (84(1)):22-30 doi:10.1159/000512406.

    PMID: 33498046
  8. 8

    Widespread inflammation in CLIPPERS syndrome indicated by autopsy and ultra-high-field 7T MRI.

    Blaabjerg M, Ruprecht K, Sinnecker T, et al.

    Neurology(R) neuroimmunology & neuroinflammation 2016; (3(3)):e226 doi:10.1212/NXI.0000000000000226.

    PMID: 27144217
  9. 9

    A case report of CLIPPERS syndrome with gait and cognitive impairment.

    Shrestha AM, Bashyal S, Kharbuja N, et al.

    BMC neurology 2025; (25(1)):470 doi:10.1186/s12883-025-04487-9.

    PMID: 41249905
  10. 10

    CLIPPERS and its mimics: evaluation of new criteria for the diagnosis of CLIPPERS.

    Taieb G, Mulero P, Psimaras D, et al.

    Journal of neurology, neurosurgery, and psychiatry 2019; (90(9)):1027-1038 doi:10.1136/jnnp-2018-318957.

    PMID: 31072955
  11. 11

    Brain biopsy in patients with CLIPPERS syndrome: why and when.

    Galazky I, Büntjen L, Voges J, et al.

    Therapeutic advances in neurological disorders 2022; (15()):17562864211062821 doi:10.1177/17562864211062821.

    PMID: 35126669
  12. 12

    CLIPPERS syndrome: Case report in a Brazilian patient with a long term disease evolution.

    Marinho PB, Montanaro VV, Barroso Freitas MC, Alvarenga RM

    Multiple sclerosis and related disorders 2015; (4(4)):311-4.

    PMID: 26195048

This page provides general information about CLIPPERS symptoms, diagnosis, and treatment for educational purposes only and does not constitute medical advice. Do not change steroids or other medicines without guidance from your treating clinician.

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