# Symptoms and course of disease of ANCA-associated vasculitis
ANCA-associated vasculitis progresses in phases, with significant differences between patients. The three main forms — granulomatosis with polyangiitis (GPA), microscopic polyangiitis (MPA), and eosinophilic granulomatosis with polyangiitis (EGPA) — each have their own pattern of organ involvement, but many symptoms overlap. What is described below applies to the general course of the disease; which organs get involved in you and how quickly that happens varies from person to person.
Initial phase (first symptoms until diagnosis)
In the initial stages, unspecific symptoms often occur that can easily pass as a common infection or allergy. This can delay the diagnosis — on average, it took a few weeks to months before vasculitis is recognized.
**General symptoms: **
- Tiredness and overall feeling of unwell being
- Fever (not always but regularly occurring)
- Weight loss without exercise
- Muscle pain and joint pain
**Involvement by organ (may vary by form) :**
*Nose, sinuses and throat* (especially with GPA): Nosebleeds, nasal congestion that just won't go away, chronic sinusitis, sore throat, hoarseness. For many patients, this is the first thing you notice. These complaints are often treated as a common cold or allergy.
*Lungs* (frequent in all three forms): Dry cough, sometimes bleeding when coughing, shortness of breath. This can gradually get worse.
*Kidney* (often silent at first): Blood in urine, frothy urine. Many patients only notice this by chance, for example during a routine check-up.
*Nerves* (in 10-15% of patients): Tingling in feet or hands, muscle weakness in the arm or leg, facial nerve paralysis.
*Skin* (especially with GPA and EGPA): Purple or red rash (papules), usually on legs and buttocks; lumps under the skin.
*Eyes* (especially with GPA): Redness, pain, impaired vision. In severe cases, sudden blindness may occur due to loss of blood in the optic nerve.
*With EGPA specific*: Asthma or asthmatic symptoms (wheezing, tightness), hitherto unknown; cough with phlegm honey A significantly increased number of certain white blood cells (eosinophils) in the blood.
**Meaning for daily life:**
In this phase, many feel ill without knowing why. Sleeping becomes difficult due to fever or cough. Work and household tasks are difficult. Many patients visit multiple doctors before the correct diagnosis is made. This can feel frustrating. At the same time, anxiety can increase when symptoms do not improve.
Phase of active disease (untreated or after treatment start)
Without treatment, ANCA vasculitis worsens rapidly. For some, this takes days to weeks, for others in weeks to months. With treatment, improvement usually begins after a few weeks, but not always evenly.
**Worsening of existing symptoms: **
- Fever can be high and persistent
- Weight loss accelerates
- Fatigue becomes profound — patients describe this as complete exhaustion
- Muscle pain may get worse or affect new areas
**Signs of serious organ involvement: **
*Lungs*: Bleeding from the respiratory tract (red or brown sputum when coughing) can become serious. Respiratory distress may increase suddenly. This is a warning.
*Kidney*: Renal fluid production decreases (less urination). Feet and face may become swollen. Anemia may develop. Blood pressure may rise. This can quickly lead to kidney failure.
*Nerves*: Weakness in one particular foot or hand can suddenly get worse. Facial muscle paralysis can occur within hours.
*Skin*: Rash may expand. Skin ulcerations (open wounds) may occur.
*Eyes*: Sudden vision loss is an emergency — this requires immediate recording.
*Heart*: Chest pain, heart palpitations, shortness of breath at rest.
**Meaning for daily life:**
Many daily activities become impossible. Many patients cannot work. Even cooking, washing, or shopping require breaks. Fear is great because symptoms can worsen unimaginably quickly. Hospital admission is likely needed at this stage. Treatment begins, usually with strong anti-inflammatory agents and immunosuppressants.
**Figures about this phase: **
Little recent data exists on the untreated natural history of ANCA vasculitis; in the pre-treatment era (1980s) five-year survival without treatment was approximately 10-20%. With modern treatment this phase is much shorter and less fatal — the majority achieve remission within 3-6 months — but this varies greatly depending on which organs are involved, how quickly treatment starts, and how well the body responds to medication. Patients with kidney and lung bleeding have a less favorable prognosis than those with only nasal-sinus disease. Individual differences are enormous.
Phase of remission (recovering, symptoms subsiding)
This occurs when the anti-inflammatory treatment takes effect. This does not happen everywhere at once — a patient may still feel tired while kidney function is already improving, or vice versa.
**How symptoms disappear:**
- Fever disappears first (usually within days to two weeks after starting treatment)
- Muscle pain and joint pain decrease
- Energy gradually returns — but this can take weeks to months
- Weight may start to return
- Lung complaints decrease (coughing becomes less)
- Kidney function improves; less swelling, less blood in urine
- Skin rash fades
- Nerve symptoms may slowly resolve, but not always completely
**What sometimes remains:**
- Fatigue may persist for months or even longer, even when other signs disappear
- Anemia does not always recover quickly
- Kidney damage (scarring) that developed in the active phase may be permanent
- Some retinal bleeds may cause permanent vision loss
- Certain nerve damage is not always reversible
**Meaning for daily life:**
This is noticeable improvement — patients recognize themselves again. Yet this process is slow and uneven. Many people try to return to normal too quickly; this can be disappointing. Regular outpatient visits, blood and urine tests remain necessary to ensure it stays stable. Medication is gradually reduced — this happens carefully and under close supervision. Fear of relapse plays a role.
**Figures about this phase: **
When remission is achieved, survival depends on disease trajectory and organ involvement. Studies from recent years (including J-CANVAS, a Japanese registry) show that patients in remission with good kidney function and without active lung disease have a relatively good long-term prognosis — 5-year survival above 80% in modern cohorts — but this varies greatly. Severe kidney failure or lung bleeds at the onset give lower survival rates. Again: these are averages for groups and say nothing about one individual.
Phase of remission under maintenance observation
Many patients reach a stable level here. This can last months to years. Medication is maintained at a lower level or stopped entirely (depending on disease severity and doctor's judgment).
**What patients usually feel:**
- Normal energy levels (for those who achieve this)
- No active inflammatory symptoms
- Normal temperature
- Normal eating and sleeping patterns
- Good functioning in daily life and work (for those who achieve this)
**What remains under control:**
- Regular (usually 3-6 weekly) blood and urine tests
- Blood pressure monitoring
- Monitoring of kidney function
- Follow-up scans or tests of previously affected organs
- Immunosuppressive medication is often continued at lower dose
**Meaning for daily life:**
This feels like "just living," but with the knowledge that control must be maintained. Many patients return to work. Social activities resume. Yet vigilance remains necessary — patients learn to recognize symptoms that may indicate recurrence. Some have residual effects (fatigue, vision loss, kidney insufficiency) to which they adapt.
**Duration:** The remission phase can last from months to decades. Relapse (return of active disease) occurs in approximately 50% of patients within 5 years, in others never again. This is highly individual — early-onset kidney or lung involvement carries higher recurrence risks.
**Numbers:**
Studies from recent years (J-CANVAS, American VCRC cohorts) show five-year survival in remission of 85-90%, provided no severe kidney failure was present at the start. In patients with creatinine increase >50% during the active phase, the prognosis is unfavorable. Infection is an important cause of death in remission, caused by prolonged immune suppression. We say this to make clear that remission is not the same as cure.
Phase of relapse (return of disease)
This can happen after weeks, months, or years of rest. Relapse is not a failure of patient or doctor — it is part of the natural history of vasculitis for many people.
**Signals of relapse (variable):**
- Fever returns
- Fatigue strikes suddenly
- Blood in urine
- Nosebleeds or sinus problems return
- New cough or blood loss
- New or returning skin rash
- Muscle pain
**How quickly does it progress:**
Some relapses are mild and slow — symptoms increase over weeks. Others are abrupt — complaints develop within days. This varies per relapse, even in the same patient.
**Meaning for daily life:**
This feels like disappointment or fear: "Will everything start all over again?" Often not. Doctors now have more knowledge and relapse is usually recognized and addressed more quickly. Medication is usually increased or changed. Working can become difficult when relapse is active. Psychological impact can be significant.
**Numbers:**
Approximately 40-50% of patients in remission develop active disease again within five years (data from studies 2020-2024). This means that 50-60% have no relapse. For those who do relapse, recovery usually takes less time than the first time — because treatment starts sooner and is applied faster. Survival after relapse depends on organ involvement; new kidney damage in relapse worsens prognosis.
Late phase / chronic complications
After vasculitis has passed, long-term effects may occur.
**Organ damage from previous inflammation:**
*Kidneys*: Chronic n