M30-M36: Systemic connective tissue disorders

M30: Polyarteritis nodosa and related conditions

Polyarteritis nodosa and related conditions, commonly grouped together under the ICD-10 code M30, represent a group of rare disorders characterized by inflammation of the small and medium-sized arteries, which become swollen and damaged. These arteries carry oxygen-rich blood to the heart, brain, and other parts of the body, and their inflammation can cause serious problems. The exact causes for these conditions are often unknown, but they could be triggered by infections, medication, or abnormalities in the immune system, leading to various symptoms including fatigue, weight loss, fevers, and muscle and joint pain. Over time, these conditions can progress and potentially cause complications such as organ damage or stroke, depending on the affected systems in the body.