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Health condition

POEMS syndrome, a rare plasma cell disorder - and why it is so often missed.

Nerve damage that looks like CIDP, but with a hidden plasma cell clone and raised VEGF behind it. Recognised early and treated by the right specialists, outcomes are far better than they once were.

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Why trust this guide

  • 01

    Editorial team

    Written by our editorial team from the UK sources listed on each page.

  • 02

    Sourced from the literature

    Checked against the Dispenzieri diagnostic criteria, European neurology guidance and peer-reviewed sources you can see at the end.

  • 03

    Current for 2026

    Reflects modern practice, including VEGF testing, targeted radiotherapy and myeloma-type systemic therapy.

Key facts

POEMS syndrome at a glance.

The essentials, in plain English - what it is, what drives it, and how it is recognised and treated in the UK today.

  • What it is

    A rare plasma cell disorder in which a small clone of abnormal plasma cells drives damage to nerves and several other organ systems.

  • The acronym

    Polyneuropathy, Organomegaly, Endocrinopathy, Monoclonal plasma cell disorder and Skin changes. Few patients have every letter.

  • The driver

    Vascular endothelial growth factor (VEGF) is markedly raised and is thought to account for the swelling, fluid build-up and skin changes.

  • Often missed

    The neuropathy closely resembles chronic inflammatory demyelinating polyneuropathy (CIDP), and many patients are treated for CIDP first.

  • How it is confirmed

    Polyneuropathy and a monoclonal plasma cell disorder are both required, plus one major and one minor criterion.

  • Outlook

    Treatment is targeted at the plasma cell clone. Outcomes have improved substantially, and nerve recovery is slow but often meaningful.

Why this guide matters

A rare disease, hiding in plain sight.

POEMS syndrome is uncommon enough that many clinicians will never see a case. The three points below shape everything else on this page.

  • Delay is the main hazard

    Because the neuropathy resembles CIDP, diagnosis is often delayed by months or years. Nerve damage that accrues in that time is slow to recover.

  • It is one disease, not a checklist

    Nerve, hormone, skin, fluid and bone findings share one cause - VEGF from a plasma cell clone. Spotting the pattern is what leads to the right tests.

  • Treatment targets the clone

    Radiotherapy for localised disease and systemic therapy for disseminated disease can reverse the process, so getting to the right specialist team matters.

How the diagnosis is made

From unexplained neuropathy to a clear diagnosis.

Diagnosis needs both a polyneuropathy and a monoclonal plasma cell disorder, plus at least one major and one minor criterion. Here is how that is built up, in order.

  1. 01

    Suspecting

    History and examination

    A careful account of numbness, weakness, swelling, skin and hormonal changes - looking for a pattern that spans several body systems.

  2. 02

    Suspecting

    Nerve conduction studies

    Show a mixed demyelinating and axonal pattern. Features such as marked axonal loss can help separate POEMS from CIDP.

  3. 03

    Suspecting

    Paraprotein blood and urine tests

    Serum and urine electrophoresis with immunofixation, plus serum free light chains. The paraprotein is often small and may be missed without immunofixation.

  4. 04

    Confirming

    VEGF and endocrine bloods

    Serum or plasma VEGF, blood count, thyroid, cortisol, sex hormones, prolactin and glucose, to look for the minor and major criteria.

  5. 05

    Confirming

    Imaging

    Skeletal survey, CT or PET-CT to find sclerotic bone lesions, enlarged lymph nodes and organ enlargement.

  6. 06

    Staging

    Bone marrow and tissue biopsy

    Marrow biopsy usually shows few plasma cells. A lymph node or bone lesion may be sampled if Castleman disease or a localised clone is suspected.

  7. 07

    Staging

    Specialist team review

    Haematology and neurology together confirm the diagnosis, decide whether disease is localised or disseminated, and plan treatment.

Typical timeline: once suspected, a working diagnosis can be reached within weeks - suspicion is the slow step.

Symptoms

What POEMS syndrome actually looks like.

Nerve symptoms usually lead, with other features appearing alongside or later. No single patient has every finding, and each one has other, commoner causes.

  • Numbness, tingling and weakness

    Usually starts in the feet, rises symmetrically and can cause foot drop and difficulty walking. Often painful.

  • Organ enlargement

    Liver, spleen or lymph nodes may be enlarged - sometimes found only on a scan or examination.

  • Hormonal changes

    Low sex hormones, underactive thyroid, diabetes or adrenal problems - causing fatigue, sexual dysfunction or weight change.

  • Skin changes

    Darkening, excess hair growth, thickening, white nails and small red-purple glomeruloid haemangiomas.

  • Fluid build-up

    Swollen legs, a swollen abdomen (ascites) or fluid around the lungs or heart, driven by leaky blood vessels.

  • Sclerotic bone lesions

    Dense areas of bone, usually painless and found on imaging. A key clue - and often the target of radiotherapy.

  • Optic disc swelling

    Papilloedema can blur vision or cause headaches, and is picked up on an eye examination.

  • Blood count changes and clots

    Raised platelets or red cells are common, and the risk of venous and arterial clots is higher than average.

Treatment

How POEMS syndrome is treated.

Radiotherapy for localised disease, systemic therapy for disseminated disease - with supportive care and rehabilitation alongside, and VEGF followed over time.

  • Radiotherapy

    For localised disease - an isolated sclerotic bone lesion, or a very small number, with no clonal plasma cells in the marrow. It can give long-lasting control.

  • Lenalidomide and dexamethasone

    A widely used oral combination for disseminated disease. Response is usually seen first in VEGF levels, then in symptoms.

  • Bortezomib-based regimens

    A proteasome inhibitor given by injection, often with dexamethasone. Choice and schedule are adapted to existing nerve damage.

  • Melphalan and dexamethasone

    An established alkylating-agent option. Used with care where a stem cell transplant is planned, as it can affect stem cell collection.

  • Autologous stem cell transplant

    High-dose chemotherapy with your own stem cells for eligible patients. Often produces deep, durable responses but carries POEMS-specific risks, so is done in experienced centres.

  • Supportive medical care

    Managing fluid overload, replacing deficient hormones, treating diabetes, and being alert to clots. Steroids or IVIG used for CIDP usually don’t help POEMS.

  • Physiotherapy and rehabilitation

    Strength, balance and gait work, occupational therapy and orthoses such as ankle supports. Central to recovering function as nerves heal.

  • Response monitoring

    Repeat VEGF, paraprotein, imaging and nerve assessment after treatment, and long-term follow-up because disease can return.

What this guide is based on

The sources behind every claim on this page.

Specialist haematology and neurology literature, current at the time of last review.

Key references

Criteria and papers we relied on.

A quiet reminder

This guide is for information, not medical advice.

A haematologist and neurologist who know your history can tell you which parts apply to you. If in doubt, get seen.

  • Dispenzieri A. POEMS syndrome: 2021 update on diagnosis, risk-stratification, and management. American Journal of Hematology, 2021.

  • Dispenzieri A, et al. POEMS syndrome: definitions and long-term outcome. Blood, 2003.

  • European Academy of Neurology and Peripheral Nerve Society. Guideline on diagnosis and treatment of chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), second revision.

  • Orphanet. POEMS syndrome - disease summary.

Red flags

When POEMS syndrome needs urgent attention.

Some features signal a complication or an unrecognised diagnosis. These are the situations where waiting is the wrong choice.

  • Rapidly worsening weakness

    Trouble rising from a chair, foot drop or frequent falls over days to weeks needs prompt medical review, not a wait-and-see approach.

  • Sudden breathlessness

    Fluid around the lungs, pulmonary hypertension or a clot on the lung can all cause it - seek urgent assessment.

  • Swollen, painful leg or chest pain

    Suggests a deep vein thrombosis or pulmonary embolism. Call 999 or go to A&E if breathless or the chest pain is severe.

  • Stroke or heart attack symptoms

    Arterial clots are reported in POEMS. Face drooping, arm weakness, slurred speech or crushing chest pain is a 999 emergency.

  • Blurred vision or persistent headache

    May reflect papilloedema. A prompt eye examination protects sight and should not be delayed.

  • Fast-growing abdominal swelling

    Ascites can develop quickly and cause pain or breathlessness - your specialist team needs to know the same day.

  • Symptoms of adrenal insufficiency

    Severe fatigue, dizziness, vomiting or low blood pressure can signal an endocrine crisis and needs urgent care.

  • A CIDP diagnosis that isn’t responding

    If neuropathy hasn’t improved with CIDP treatment, ask whether a paraprotein and VEGF have been checked.

  • Fevers, night sweats or weight loss

    Particularly with swollen glands - may point to Castleman disease or active disease and warrants specialist review.

Living with it

A long road, with steady progress.

Four things that make the biggest difference day to day - patience with recovery, staying active, knowing the clot warning signs and keeping up follow-up.

A quiet reminder

A rare condition can feel isolating.

Fatigue and slow recovery are draining. Tell your team how you are coping - support from nurse specialists and patient groups is available.

  1. 01 Recovery

    Expect a slow recovery

    VEGF often falls within months, but nerves heal slowly. Improvement can continue for a year or more after treatment.

  2. 02 Movement

    Keep moving, safely

    Regular physiotherapy, supportive footwear or orthoses and falls-proofing at home protect independence while strength returns.

  3. 03 Clots

    Know the clot warning signs

    Ask your team about clot prevention around hospital stays or long periods of immobility, and act fast on a swollen calf or sudden breathlessness.

  4. 04 Follow-up

    Stay under specialist follow-up

    Repeat VEGF, blood tests and scans catch a relapse early. Keep appointments even when you feel well.

Frequently asked

Everything we get asked about POEMS syndrome.

Quick answers on the condition, CIDP, VEGF, treatment and outlook.

  • What is POEMS syndrome?

    A rare plasma cell disorder. A small clone of abnormal plasma cells, usually producing lambda light chains, is linked to raised VEGF and a combination of nerve damage, organ enlargement, hormonal problems, skin changes and fluid build-up. The name is an acronym of the main features, although not every patient has all of them.

  • Is POEMS syndrome a cancer?

    It is classed as a plasma cell neoplasm and is treated by haematologists, often with drugs also used for myeloma. But it behaves differently: the abnormal clone is usually small, the bone lesions are typically sclerotic rather than destructive, and the symptoms come mainly from VEGF rather than from bulk of disease.

  • Why is it mistaken for CIDP?

    The neuropathy looks alike - symmetrical, progressive, with slowed nerve conduction. Clues pointing to POEMS include marked axonal loss, weight loss, swelling, skin changes, sclerotic bone lesions and a paraprotein. Treatments that help CIDP, such as steroids or IVIG, generally do not help POEMS neuropathy.

  • What is VEGF and why is it tested?

    Vascular endothelial growth factor is a signalling protein that makes blood vessels leaky and promotes their growth. It is markedly raised in POEMS syndrome, is a major diagnostic criterion, and is followed after treatment because a falling level generally tracks with response.

  • How is POEMS syndrome treated?

    It depends on whether the disease is localised or disseminated. Radiotherapy is used for an isolated bone lesion. Disseminated disease is treated with systemic therapy such as lenalidomide and dexamethasone, bortezomib-based regimens or melphalan, and eligible patients may have an autologous stem cell transplant. Newer agents, including daratumumab, are being studied and used in some specialist centres.

  • What is the outlook?

    Outcomes have improved substantially with modern treatment, and many patients now live well beyond a decade after diagnosis. Nerve recovery is slow but frequently significant, and long-term follow-up is needed because relapse can occur. Your haematology and neurology team can give an individual picture.

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