A 50-year-old man presents with a 1-month history of recurrent fevers, night sweats, and pain in his hands and legs. He reports a recent episode of severe testicular pain and difficulty walking due to weakness in his left leg. His past medical history includes untreated hepatitis B. Labs reveal an elevated white blood cell count, ESR, and a negative ANCA test. A biopsy of an affected artery shows transmural inflammation and fibrinoid necrosis. Which of the following diagnostic findings is most characteristic of this patient’s condition?

A 45-year-old man presents with a 3-month history of fever, weight loss, and severe abdominal pain that worsens after eating. He also reports numbness and tingling in his feet. His medical history includes hypertension and a recent diagnosis of hepatitis B. On examination, his blood pressure is 160/95 mmHg, and he has livedo reticularis on his legs. Laboratory tests show an elevated erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP). What is the most likely underlying mechanism of this patient’s condition?

A 50-year-old man presents with fever, unintentional weight loss, muscle pain, and numbness in his right foot for the past few months. He has a history of hypertension and was recently diagnosed with hepatitis B infection. On examination, he has a skin condition characterized by a network-like pattern of reddish-blue discoloration on his lower extremities and asymmetric weakness in the right foot. Laboratory tests reveal elevated ESR and CRP, negative ANCA, and normal complement levels. Angiography shows multiple aneurysms and narrowing in the renal arteries. What is the most likely diagnosis?