嗜铬细胞瘤的CT诊断

目的：分析嗜铬细胞瘤的CT表现，探讨CT对该病的诊断价值。方法：经手术证实的12例嗜铬细胞瘤术前行螺旋CT检查，平扫后行动态增强双期或多期扫描，观察病灶的强化特征，结果：共13个病灶，平均直径5.6cm。平扫12个病灶为低密度个为略高密度，动脉期10个病灶实质部分强化明显，而坏死和囊变分析无强化。3个病灶强化不明显，门脉期仍有8个病灶持续强化，其余病灶为低密度。结论：螺旋CT动态增强扫描可充分显示嗜铬细胞瘤的血供特征，在诊断和鉴别诊断中有重要作用。异位嗜铬细胞瘤的诊断需结合临床资料。

The CT Diagnosis of Pheochromocytoma

Objective: To analyze the findings of pheochromocytoma in the CT scanning, to discuss the value of CT in the diagnosis of this disease. Methods: 12 cases of pheochromocytoma were confirmed by surgery. Helical CT was performed before surgery. Dual-phase or multi-phase dynamic contrast scanning were carried out after precontrast CT. The pattern of enhancement were mainly observed. Results: 13 tumors were found by CT in all cases. The average diameter was 5.6cm. 12 tumors showed hypodense and one tumor displayed slightly hyperdense on precontrast CT imaging respectively. Ten tumors enhanced markedly on arterial CT scanning, meanwhile 8 tumors still had enhancement on portal venous phase scanning. Conclusion: Contrast dynamic helical CT scanning could reflect sufficiently character of the blood supply of pheochromocytoma and it plays an important role in the diagnosis and differential diagnosis. The diagnosis of ectopic pheochromocytoma should be combined with the clinical and experimental results.