M31.7: Microscopic polyangiitis

Microscopic polyangiitis (M31.7) is a rare autoimmune condition, where the body's immune system mistakenly attacks its own healthy cells, particularly in the small blood vessels, or capillaries. This attack leads to inflammation, which can damage various body systems, with kidneys and lungs being most commonly affected. Symptoms often start gradually, and can include tiredness, weight loss, muscle and joint aches, and a fever. As the disease progresses, it can lead to kidney problems, visible as dark urine, reduced urine output, ankle swelling, or high blood pressure. The lungs may also be affected, causing shortness of breath or coughing up blood. It's not clear why the immune system starts behaving this way, and microscopic polyangiitis can affect anyone, regardless of age, gender, or ethnicity. Despite its serious nature, an early diagnosis can significantly improve the prognosis of this condition.

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The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.

If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.

For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.