Subsequent pathological examination indicated a histiocytic proliferation positive for CD68 and factor VIII, and negative for CD1a and S100, with Touton giant cells characteristic of ECD.

• 其后的病理检查表现出ECD特征性的组织细胞增生：CD68和VIII因子阳性，CD1a和S100阴性，伴Touton巨细胞。