Sacral nerve root entrapment demonstrated on computed tomography--'the winking ogre'.

Pictorial analogies are a descriptive modality often employed to convey radiological (as well as clinical and pathological) appearances. Examples of this useful descriptive device abound and many anatomical terms take their origin from such analogies. The cauda equina (horse's tail) and the uvula (grape) are but two classic examples.

Brain stem tuberculoma in adult patients: diagnosis and treatment.

A consecutive series of six adult patients ranging in age from 29 to 53 years is presented. The clinical and radiological features in each patient are described. Attention is drawn to the features demonstrated on computed axial tomography.