“…Although the likely infectious trigger of the marked inflammatory immune response remains unknown, the pathologic findings have been well-described and are virtually identical in all patients with the illness, varying only in the severity of the lesions. In addition to arteries and veins [3], the following organ systems typically demonstrate inflammatory lesions: cardiovascular system (myocarditis, pericarditis, and less commonly endocarditis); respiratory system (bronchitis, interstitial pneumonia, and pulmonary nodules); digestive system (stomatitis, sialoduct-adenitis, enteritis, hepatitis, cholangitis, pancreatitis, and pancreatic ductitis); urinary system (focal interstitial nephritis, cystitis, and prostatitis); nervous system (aseptic meningitis and neuritis); and hematopoetic system (lymphadenitis and splenitis) [4,16]. In the 1st month after onset of illness, the inflammatory lesions are quite severe.…”