Juvenile temporal arteritis associated with Kimura's disease.

A case of juvenile temporal arteritis, which is a rare vascular lesion in children and young adults, associated with Kimura's disease in a healthy 23-year-old asymptomatic man is described. The patient presented with a painless 2.5 cm nodule with eosinophilia and normal erythrocyte sedimentation rate. Histologically, the left superficial artery showed marked intimal thickening with moderate eosinophilic infiltrates, constriction of the vascular lumen, focal disruptions of the internal elastic lamina and media, moderate eosinophilic infiltrates in the adventia, and absence of giant cells. The subcutaneous tissue surrounding the artery was characterized by lymphofollicular hyperplasia, marked eosinophilic infiltrates in the intra- and extra-follicles with abscess, capillary proliferations, lymphocytic, plasma cell and mast cell infiltrates, and fibrosis in the interfollicular region. Immunohistochemically, reticular, positive IgE staining was observed in the germinal centers. Clinically and histologically, the lesion was consistent with juvenile temporal arteritis associated with Kimura's disease. The findings indicate that both entities are closely related and juvenile temporal arteritis may be secondary to Kimura's disease.