Immune-Mediated Cartilage Inflammation
- Relapsing polychondritis is a rare, IMMUNE-MEDIATED disease characterised by recurrent episodes of INFLAMMATION and progressive DESTRUCTION of CARTILAGE and other proteoglycan-rich connective tissue, affecting the EARS, NOSE, LARYNGOTRACHEAL airway, JOINTS, eyes, audiovestibular system and cardiovascular system.
- The clinical HALLMARK is BILATERAL AURICULAR CHONDRITIS - a painful, red, swollen pinna - that characteristically AFFECTS the cartilaginous ear but SPARES the non-cartilaginous EARLOBE; recurrent attacks produce a floppy, deformed ('cauliflower') ear, and this lobe-sparing pattern is a key examination clue.
- NASAL chondritis can cause a SADDLE-NOSE deformity, and LARYNGOTRACHEAL chondritis is the most DANGEROUS manifestation - inflammation and softening/collapse or stenosis of the airway causing hoarseness, cough, stridor and potentially LIFE-THREATENING airway obstruction; airway involvement is a leading cause of morbidity and mortality.
- The ARTHRITIS is typically a SERONEGATIVE, NON-EROSIVE, episodic and often migratory poly/oligoarthritis affecting peripheral and parasternal (costochondral/sternoclavicular) joints - it does not usually cause the erosive joint destruction of rheumatoid arthritis - so the orthopaedic relevance is mainly recognising the systemic disease behind a seronegative arthritis rather than reconstructing destroyed joints.
- DIAGNOSIS is clinical, using the McADAM (and modified MICHET) criteria (e.g. bilateral auricular chondritis, non-erosive seronegative inflammatory arthritis, nasal chondritis, ocular inflammation, respiratory-tract chondritis, audiovestibular damage), supported by inflammatory markers and imaging of the airway; according to PubMed, classical features such as auricular chondritis can appear LATE, so it must be considered in unexplained cartilage-related or ocular inflammation, and biopsy is occasionally needed.
- There are important ASSOCIATIONS - other autoimmune disease, ANCA-ASSOCIATED VASCULITIS, and haematological disease including MYELODYSPLASTIC syndrome and the recently described VEXAS syndrome (in older men) - and MANAGEMENT is medical and multidisciplinary: CORTICOSTEROIDS for flares with steroid-sparing IMMUNOSUPPRESSION (methotrexate, azathioprine; biologics/avacopan in selected/overlap cases), plus urgent airway management for laryngotracheal disease.
- “Relapsing polychondritis = recurrent inflammation/destruction of CARTILAGE (ear, nose, airway, joints). HALLMARK: bilateral auricular chondritis SPARING the (non-cartilaginous) earlobe; saddle-nose deformity.
- “Laryngotracheal involvement = life-threatening (airway softening/collapse/stenosis) - a leading cause of death. Arthritis is SERONEGATIVE and NON-EROSIVE.
- “Diagnosis = McAdam/Michet criteria (clinical). Associations: ANCA-vasculitis, myelodysplasia/VEXAS. Treat with corticosteroids + immunosuppression; urgent airway care.
Bilateral auricular chondritis - red, painful, swollen pinna that spares the non-cartilaginous earlobe; recurrent attacks -> floppy/'cauliflower' ear. Nasal chondritis -> saddle nose.
Laryngotracheal chondritis -> airway softening/collapse/stenosis, stridor and potentially fatal obstruction - a leading cause of death. Needs urgent airway assessment.
Presentation & Diagnosis
Relapsing polychondritis is an immune-mediated disease of recurrent cartilage inflammation and destruction. The hallmark is bilateral auricular chondritis that spares the earlobe (which lacks cartilage); nasal chondritis causes a saddle-nose deformity; and laryngotracheal chondritis causes hoarseness, stridor and potentially life-threatening airway collapse/stenosis. The arthritis is seronegative, non-erosive, episodic and often migratory (peripheral and parasternal joints). Ocular inflammation, audiovestibular damage and cardiovascular disease (aortitis, valve disease) also occur. Diagnosis is clinical (McAdam/Michet criteria); classical features can appear late, so it must be considered in unexplained cartilage-related or ocular inflammation.
Associations & Management
- Associations: other autoimmune disease, ANCA-associated vasculitis, and haematological disease - myelodysplastic syndrome and VEXAS syndrome (older men) - screen as appropriate.
- Corticosteroids for flares, with steroid-sparing immunosuppression (methotrexate, azathioprine), and biologics/avacopan in refractory or overlap (ANCA-vasculitis) cases.
- Airway disease (the priority): urgent assessment and management of laryngotracheal involvement - this is the leading cause of morbidity/mortality (may need stenting/tracheostomy and intensive immunosuppression).
- Orthopaedic role: recognise the systemic disease behind a seronegative, non-erosive arthritis; coordinate any care with rheumatology.
Two features make relapsing polychondritis recognisable and dangerous. The diagnostic clue is the pattern of ear involvement: bilateral, painful, red auricular chondritis that affects the cartilaginous pinna but spares the non-cartilaginous earlobe - a pattern that, with a saddle-nose deformity and a seronegative non-erosive arthritis, points strongly to the disease (formalised in the McAdam and Michet criteria). The danger is the airway: laryngotracheal chondritis softens and can collapse or stenose the airway, producing stridor and potentially fatal obstruction, and it is a leading cause of death - so respiratory symptoms in a patient with chondritis must be assessed urgently. Because classical features can appear late and because the disease associates with ANCA-vasculitis and with myelodysplasia/VEXAS, it should be considered in unexplained cartilage-related or ocular inflammation and managed with rheumatology, with corticosteroids and immunosuppression and prompt airway care.
Evidence & Key Studies
Relapsing polychondritis with late auricular chondritis - a diagnostic challenge
- Relapsing polychondritis is a rare autoimmune disease; classical features such as auricular chondritis (perichondritis) can manifest late, creating diagnostic challenges, and other (e.g. ocular) signs may precede them.
- The diagnosis was confirmed using the Modified Michet's criteria once auricular chondritis developed, after systemic features (fever, sensorineural hearing loss, nasal tenderness, hoarseness) and ocular inflammation.
- Management with corticosteroids and azathioprine, in a multidisciplinary setting, was required for the relapsing systemic disease.
Relapsing polychondritis overlapping with ANCA-associated vasculitis
- Relapsing polychondritis (presenting with auricular cartilage inflammation) can overlap with ANCA-associated vasculitis, which can cause severe organ involvement including necrotizing/crescentic glomerulonephritis and renal failure.
- Treatment in the overlap case required high-dose corticosteroids with cyclophosphamide induction, and avacopan was added for the ANCA-associated vasculitis component.
- The case highlights relapsing polychondritis as part of a systemic autoimmune spectrum that can require intensive immunosuppression.
According to PubMed, the recognition that classical auricular chondritis can appear late (with the diagnosis made on Modified Michet's criteria) and the use of corticosteroids and azathioprine come from the cited Rana report; the association/overlap with ANCA-associated vasculitis and the need for intensive immunosuppression (corticosteroids, cyclophosphamide, avacopan) from the cited Nguyen report. The hallmark lobe-sparing auricular chondritis, the saddle-nose deformity, the life-threatening laryngotracheal disease, the seronegative non-erosive arthritis, the McAdam criteria, and the associations with myelodysplasia/VEXAS are standard, well-established teaching. (See also our Vasculitides, Seronegative Spondyloarthropathy and Saddle-Nose / Septal Pathology topics.)
Clinical Decision Scenarios
Practise clinical reasoning and management decisions out loud
“A patient has recurrent painful, red, swollen ears that spare the earlobes, a saddle-nose deformity and a seronegative arthritis. What is the diagnosis and what is the main danger?”
Mnemonics & Memory Aids
CHONDRO
Hook:CHONDRO: Cartilage destruction, Hearing/eyes, Otic (lobe-sparing), Nose (saddle), Danger (airway), Rheumatic (seronegative), Old men/VEXAS + steroids.
Recognise it
- Bilateral auricular chondritis SPARING the non-cartilaginous earlobe
- Saddle-nose deformity (nasal chondritis)
- Seronegative, non-erosive, episodic arthritis
The danger
- Laryngotracheal chondritis -> airway softening/collapse/stenosis
- Hoarseness, stridor, potentially fatal obstruction (leading cause of death)
- Also ocular inflammation, audiovestibular damage, aortitis/valve disease
Diagnosis & associations
- Clinical: McAdam / modified Michet criteria (features can appear late)
- Associations: other autoimmune disease, ANCA-vasculitis
- Haematological: myelodysplastic syndrome, VEXAS (older men)
Management
- Corticosteroids for flares + steroid-sparing immunosuppression (methotrexate/azathioprine)
- Biologics / avacopan for refractory or overlap cases
- Urgent airway management; multidisciplinary with rheumatology