A Case Report of Annular Elastolytic Giant Cell Granuloma

Annular elastolytic giant cell granuloma(AEGCG) is a rare granulomatous skin condition. We present a case of a 67-year-old man with annular plaques on the face, neck, shoulder, back and upper limbs, and mildly pruritis exceeding one year. Histopathological examination demonstrated granulomatous inflammatory infiltration of lymphocytes, histiocytes and multinuclear giant cells in the middle and the upper dermis, with more local eosinophils. Elastic fiber staining showed that elastic fibers were absent in granuloma area and were engulfed by multinucleated giant cells. Based on the clinical and histopathological findings, a diagnosis of AEGCG was made. The etiology and pathogenesis of this condition are unclear, and atypical manifestations of non-exposed areas can also occur.It is usually related to systemic diseases lacks specific treatment at present.