纵隔囊性成熟畸胎瘤的CT诊断

CT Diagnosis of Mediastinal Cystic Mature Teratoma

目的探讨纵隔囊性成熟性畸胎瘤的CT特点。资料与方法回顾性分析11例经手术病理证实的纵隔囊性成熟性畸胎瘤患者的CT资料,分析观察囊肿在纵隔的分布、囊肿形态、囊内容物密度、囊壁、囊肿与心脏大血管接触面(MCI)。结果11例均位于前纵隔,其中3例位于前中纵隔,7例主体位于或累及前中纵隔,1例位于前下纵隔。9例呈类圆形,1例呈卵圆形,1例呈半圆形。7例病灶内见脂肪成分;4例囊壁内有脂肪结节;10例表现为显壁囊肿;MCI突出型6例、平坦型5例。术中及病理检查各囊腔内有毛发等组织。结论纵隔囊性成熟性畸胎瘤的CT表现复杂多样,但具有一定的特征,CT在其诊断与鉴别诊断中具有重要价值。

Purpose To explore the CT features of mediastinal cystic mature teratoma. Materials and Methods CT images of 11 patients with pathologically confirmed mediastinal cystic mature teratoma were retrospectively analyzed, distribution within mediastinum, shape of cysts, capsule contents density, walls of cysts and mass cardiovascular interlace （MCI） were analyzed. Results All the 11 cases were located in the anterior mediastinum, including three cases confined to the anterior mediastinum, seven cases located mainly within or involving the anterior and middle mcdiastinum, and one case confined to the anterior inferior mediastinum. Nine cases were round, one case was oval, one case was half round. Seven cases with fat ingredients displayed within the lesions, tbur cases with fat nodules within the cystic walls; ten cases showed as cysts with significant walls; MCI protrude type in six cases and smooth type in five cases. Fat, hair, keratosis, mucus and other ingredients were found in each cavity in surgery and pathology exalnination. Conclusion CT features of mediastinal cystic mature teratoma are complex and diverse, but with certain characteristics, thus CT is of great signit]cance in the diagnosis and differential diagnosis ofmediastinal cystic mature teratoma.