What Is Fibrinoid Necrosis?

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Welcome to your one-stop resource for understanding fibrinoid necrosis. Here at Klarity, we are committed to breaking down complex medical concepts into digestible information. Rest assured, you're in the right place to gain a comprehensive understanding of fibrinoid necrosis. Our goal is to empower you with knowledge so you can take control of your health.

Picture your body's blood vessels as the highways in a bustling city. Just as a traffic jam can occur when too many cars clogging up the highway, fibrinoid necrosis happens when there's an accumulation of certain proteins, including fibrin and other substances in the blood vessels.1 This buildup can cause damage to the blood vessels and the tissues around it, leading to a form of cell death known as necrosis.2 It's a complex process, but by breaking it down, we can understand how it affects our bodies and what we can do about it.

But that is just the tip of the iceberg. There's a wealth of information to uncover about fibrinoid necrosis, so keep reading! From understanding its causes and symptoms to learning about its management and treatment, we will guide you through each aspect of this condition.


Fibrinoid necrosis is a specific type of cell death, known as coagulative necrosis, where there is an accumulation of 'debris' (proteins and other immune system substances) that can damage the 'highways' (blood vessels) and disrupt the normal 'traffic flow' (blood circulation).1,3 This buildup leads to the leakage of certain proteins, especially fibrin, from the blood into the surrounding tissues.3 The result? Irreversible, uncontrolled cell death in the affected tissue. When examined under the microscope, this buildup presents as a bright pink staining pattern, a telltale sign of this type of necrosis.2 It's a unique process that sets fibrinoid necrosis apart from other types of cell death.2

Causes of fibrinoid necrosis 

Fibrinoid necrosis is often associated with conditions that cause significant inflammation and damage to blood vessels. These conditions include autoimmune diseases, where your body's defence system mistakenly attacks your own cells, and severe high blood pressure, also known as malignant hypertension.4,5 Autoimmune diseases that can lead to fibrinoid necrosis include systemic lupus erythematosus, a condition where the immune system attacks healthy tissues in the body.4 A complex interplay of factors leads to the development of fibrinoid necrosis, and understanding these causes is the first step towards managing this condition.

Signs and symptoms of fibrinoid necrosis

The signs and symptoms of fibrinoid necrosis can vary depending on where the 'traffic jams' occur in your body. They're usually related to the underlying condition causing the damage. For instance, if fibrinoid necrosis is caused by high blood pressure, symptoms may include:5

  • Headaches
  • Shortness of breath
  • Vision problems 

If an autoimmune disease is the culprit, symptoms could include:4

  • Fatigue
  • Joint pain
  • Skin rashes
  • Kidney problems 

Recognising these symptoms early can help in the timely diagnosis and treatment of fibrinoid necrosis.

Management and treatment for fibrinoid necrosis

The most effective way to manage fibrinoid necrosis is to treat the underlying condition causing it. This can include medications to control inflammation and immune response, such as immunosuppressive therapy.6 Treatments to manage blood pressure, like antihypertensive drugs, are also crucial. In some cases, lifestyle changes can also help control blood pressure and reduce inflammation such as:

  • A healthy diet
  • Regular exercise
  • Stress management  

Treatment is a comprehensive approach that requires a combination of medication, lifestyle changes, and regular monitoring.


Diagnosing fibrinoid necrosis involves taking a small sample of the affected blood vessel for testing, a procedure known as a biopsy.1 The sample is subsequently scrutinised under a microscope for further analysis. The presence of a characteristic bright pink, blob-like material is indicative of fibrinoid necrosis.2 Biopsy is a detailed process that requires expert analysis and interpretation.


If left untreated, the buildup of proteins and other substances can cause damage to vital organs in your body, such as your kidneys and heart.1 In its most extreme form, the condition can progress to a point where it results in the failure of organ function. Severe high blood pressure or malignant hypertension can cause fibrinoid necrosis in tiny blood vessels in the eye. This leads to damage and death of cells in the outer part of the retina and the layer beneath it, known as the retinal pigment epithelium (RPE).1 These complications underscore the importance of early diagnosis and treatment.


How can I prevent fibrinoid necrosis?

Preventing fibrinoid necrosis involves managing the underlying conditions that can cause this type of vascular damage. This includes maintaining good control of blood pressure and effectively managing autoimmune diseases. Regular check-ups with your healthcare provider can also help monitor your condition and adjust treatment plans as necessary. Prevention is always better than cure, and in the case of fibrinoid necrosis, effective management of underlying conditions is key.

How common is fibrinoid necrosis?

Fibrinoid necrosis is a common finding in severe cases of autoimmune diseases and malignant hypertension.5 However, the exact prevalence is not well established, as it is typically a feature of other underlying conditions. Fibrinoid necrosis is a complex condition that requires further research to fully understand its prevalence and impact.

Who is at risk of fibrinoid necrosis?

Individuals with autoimmune diseases, particularly those with severe disease activity, and individuals with poorly controlled hypertension are at increased risk of fibrinoid necrosis. Additionally, there seems to be a higher chance of fibrinoid necrosis occurring in the placentas of women with pre-eclampsia, a pregnancy complication characterised by high blood pressure.1 This risk seems to be even higher in women with diabetes and in cases where the mother and baby have different rhesus blood types.1 Understanding these risk factors can help in early detection and prevention of fibrinoid necrosis.

When should I see a doctor?

If you have an autoimmune disease or hypertension and are experiencing new or worsening symptoms, it is important to seek professional medical advice. Regular check-ups can also help monitor your condition and adjust treatment plans as necessary. Promptly seeking medical attention can significantly impact one's health outcomes and overall well-being.


Fibrinoid necrosis is akin to a traffic jam in your body's blood vessels that can cause damage and disrupt normal blood flow. It's typically linked to autoimmune diseases and severe high blood pressure. The best way to manage it is to treat the underlying condition causing the damage. If you have these conditions, be vigilant for new or worsening symptoms and seek medical attention promptly. Remember, early detection and treatment can make a significant difference in managing fibrinoid necrosis. Knowledge is power, and understanding fibrinoid necrosis can empower you to take control of your health.


  1. Fibrinoid necrosis - an overview | Sciencedirect topics [Internet]. [cited 2023 Jul 18]. Available from: https://www.sciencedirect.com/topics/medicine-and-dentistry/fibrinoid-necrosis
  2. Khalid N, Azimpouran M. Necrosis. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 [cited 2023 Jul 18]. Available from: http://www.ncbi.nlm.nih.gov/books/NBK557627/
  3. Adigun R, Basit H, Murray J. Cell liquefactive necrosis. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 [cited 2023 Jul 18]. Available from: http://www.ncbi.nlm.nih.gov/books/NBK430935/
  4. Justiz Vaillant AA, Goyal A, Varacallo M. Systemic lupus erythematosus. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2023 [cited 2023 Jul 18]. Available from: http://www.ncbi.nlm.nih.gov/books/NBK535405/
  5. Naranjo M, Chauhan S, Paul M. Malignant hypertension. StatPearls [Internet]. 2023 Jun 19 [cited 2023 Jul 18]; Available from: https://www.statpearls.com/ArticleLibrary/viewarticle/23222
  6. Guo Y, Shi S, Zhou X, Liu L, Lv J, Zhu L, et al. The effect of immunosuppressive therapy in patients with fibrinoid necrosis lesions in a large cohort of patients with IgA nephropathy. J Nephrol [Internet]. 2022 May 1 [cited 2023 Jul 18];35(4):1079–89. Available from: https://doi.org/10.1007/s40620-021-01176-x

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This content is purely informational and isn’t medical guidance. It shouldn’t replace professional medical counsel. Always consult your physician regarding treatment risks and benefits. See our editorial standards for more details.

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Elena Paspel

Master of Science in Engineering (Digital Health) - Tallinn University of Technology, Estonia

Bachelor of Laws - LLB (Hons), London Metropolitan University, UK

An experienced professional with a diverse background spanning law, pricing, and eHealth/Digital Health. Proficient in copywriting, medical terminology, healthcare interoperability standards, and MedTech regulations. A strong foundation in scientific research methodologies and user experience research supports the creation of compelling content for the biopharmaceutical, CROs, medical technology, and eHealth sectors.

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