You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A 39-year-old man has had several weeks of fever, weight loss, and lack of energy. Three days prior to the assessment, he developed a left foot drop. Physical examination confirms left peroneal nerve damage and a bilateral sensory peripheral neuropathy in both legs. Laboratory evaluation reveals ESR of 105 mm/h, neutrophilia of 14,000, and a negative serologic test for ANCA. Eosinophil count is normal. Angiography reveals small aneurysms of the celiac and renal arteries.For the above patient with vasculitis syndrome, select the most likely diagnosis. and explain in detail?
PAN is a multisystem, necrotizing vasculitis of small-and medium-sized muscular arteries. Aneurysmal dilations of the arteries are characteristic. Nonspecific signs and symptoms are the usual method of presentation. Renal involvement is clinically present in 60% of cases and is the most common cause of death in untreated cases.