<prompt> Answer this question truthfullyWhat are the laboratory results for Polyarteritis nodosa?  <response>: <reason> There are no specific lab tests for diagnosing polyarteritis nodosa. Diagnosis is generally based upon the physical examination and a few laboratory studies that help to confirm the diagnosis. Laboratory findings helpful in the diagnosis of polyarteritis nodosa include CBC, ESR, C-reactive protein, p-ANCA, Hepatitis B surface antigen and hepatitic C serologies, elevated levels of liver enzymes, elevated creatinine level and hypergammaglobulinemia. 