This is a caseating granuloma. Epithelioid cells surround a central area of necrosis that appears irregular, amorphous, 图示干酪样肉芽肿。上皮细胞围绕在中央坏死区域周围，坏死物呈不规则、无定形、粉红色，干酪样坏死区状似奶酪。