CT扫描已广泛应用于临床,虽然扫描技术发展很快,但对1.5cm以下的听神经瘤还难于查出,这是它的一个缺陷。本文报导一例听神经瘤患者,第一次CT扫描阴性,直到6个月后肿瘤长到4cm大小时,才由另一台扫描仪检查出来。该患者后来经迷路进路切除了肿瘤并作了面神经改道吻合术,术后面神经功能恢复满意。 CT scans have been widely used in clinical practice. Although the scanning technology has developed rapidly, it is difficult to detect acoustic neuromas below 1.5 cm. This is one of its drawbacks. This article reports one patient with acoustic neuromas who was negative on the first CT scan until the tumor reached 4 cm in size 6 months later when it was examined by another scanner. The patient was later removed by a labyrinthine approach and he was given a facial nerve diversion and anastomosis. His facial nerve function was satisfactory after surgery.