【单选题】
有关原发综合征叙述正确的是___
A. 钙化或硬结是其常见转归
B. 原发综合征病变由原发病灶及肿大的淋巴结组成
C. 原发综合征不会发生病变恶化
D. 原发综合征基本病变是坏死
E. 原发综合征病变由原发灶及发炎的淋巴管组成
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男性，32岁。既往有胃病史，近1周来常感上腹疼痛，4h前突发上腹部剧烈疼痛，伴有恶心、呕吐。查体：腹部压痛、肌紧张，肝浊音界缩小。X线检查可见膈下游离气体，首先考虑的是___
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