Renal manifestations of Kawasaki's disease.

Renal sonographic evaluation of seven patients with mucocutaneous lymph node syndrome were performed and correlated with clinical and laboratory data either supporting or not supporting renal disease associated with this entity. Four of seven patients demonstrated significant elevations of the BUN, creatinine and/or significant proteinuria. These four patients had renal sonographic findings of increased cortical echogenicity, enlarged kidneys and enhanced corticomedullary differentiation. This complication of mucocutaneous lymph node syndrome has heretofore not been noted.