CT characteristics of ovarian dysgerminoma

Objective: To study the CT features of ovarian dysgerminoma. Methods: CT findings of 11 cases with pathologically-proved dysgerminoma of ovary were retrospectively analyzed. Results: All the 11 cases were solitary. The maximum diameter of lesion was averagely 17.1 cm. The tumor presented as a solid (n = 8) or cystic-solid (n = 3) mass. After contrast medium administration, the solid component of the lesions showed prominent enhancement on CT scan. Blood vessels were found in 5 masses. Of the 11 cases with ovarian dysgerminoma, invasion of adjacent structure (n=4), ascites (n=6) and adenopathy in pelvic wall (n=3) were demonstrated. Conclusion: Ovarian dysgerminoma has its CT characteristics. Associated with clinic data, CT is helpful in the diagnosis and differential diagnosis of ovarian dysgerminoma.

纵隔生殖细胞肿瘤的MSCT诊断

目的：分析纵隔生殖细胞肿瘤MSCT的表现,提高对本病的诊断水平。方法：共64例,采用GE Lightspeed 16层CT进行胸部平扫及增强扫描。结果：53例畸胎瘤,11例恶性生殖细胞瘤。53例畸胎瘤CT显示都含有脂肪,位于前纵膈。11例恶性生殖细胞瘤,肿瘤直径范围为7.0-28.0cm,均偏于纵隔一侧生长,位于中上前纵隔,平扫密度较低,CT值约20-30HU,增强扫描呈斑片状、边缘轻度强化;与周围大血管分界不清,肿瘤具有钻隙生长的趋势,肿瘤内部多发囊变。结论：CT对纵隔生殖细胞肿瘤,具有一定的诊断及鉴别诊断价值。

纵隔生殖细胞肿瘤的CT特征

笔者分析研究了１１例经手术病理证实的纵隔生殖细胞肿瘤的ＣＴ特征。７例良性肿块中，６例囊性（其中５例为厚壁囊性），１例混合性；肿块内出现脂肪４例，脂肪／液体平面１例，钙化４例。４例恶性肿块中，３例实质性，１例混合性；钙化１例，未见脂肪。笔者认为：ＣＴ能肯定良性肿块（畸胎瘤）的诊断，对恶性生殖细胞肿瘤和其他常见病变如恶性胸腺瘤、淋巴瘤的鉴别，则有一定限度。