Polyarteritis Nodosa

**Definition:** A form of necrotizing non-granulomatous inflammation occurring primarily in medium-sized ARTERIES, often with microaneurysms. It is characterized by muscle, joint, and abdominal pain resulting from arterial infarction and scarring in affected organs. Polyarteritis nodosa with lung involvement is called CHURG-STRAUSS SYNDROME.

**Tree numbers:** - C14.907.940.090.720 - C14.907.940.897.500 - C17.800.862.625

**Synonyms:** - Periarteritis Nodosa