Beggs I
Department of Clinical Radiology, Royal Infirmary, Edinburgh, UK.
Clin Radiol. 1998 Nov;53(11):849-50. doi: 10.1016/s0009-9260(98)80199-2.
The ultrasound ring sign is reported in two patients with benign nerve tumours. The echogenic ring lies within the mass rather than at its periphery. This appearance has not been described previously in nerve tumours.
两名患有良性神经肿瘤的患者出现了超声环形征。回声环位于肿块内部而非周边。这种表现此前在神经肿瘤中尚未有过描述。