患者男，１６岁，体检拍片发现左肺门肿物。ＣＴ检查：左下肺背侧见一混杂密度肿块，大小约４７ｃｍ×４１ｃｍ×４２ｃｍ，边界清晰，内部以软组织密度为主伴多个斑点样钙化影，ＣＴ值４６Ｈｕ～３３３Ｈｕ。其后内侧以窄基底与肋骨内缘相连，肋骨头变形，并有向肿... The patient was male, 16 years old. He had a left hepatic portal mass on a medical examination. CT examination: A mixed-density mass was seen on the dorsal side of the left lower lung. The size was about 47cm×41cm×42cm. The boundary was clear. The internal soft tissue density was mainly accompanied by multiple spot-like calcifications. The CT value was 46Hu～333Hu. Afterwards, the inner side is connected to the inner edge of the rib with a narrow base, the rib head is deformed, and the direction is swollen...