Idiopathic cervical arachnoid cyst. 3 case reports.

Three cases of cervical intradural arachnoid cysts of different forms are described in detail from the viewpoint of neuroradiological findings. In two patients the symptoms simulated juvenile muscle atrophy of unilateral upper extremity; the other case showed findings as in a tumour. It should be noted that in comparison with cysts at the thoracic level, cervical arachnoid cysts show various different neurological and neuroradiological findings. In this paper, some characteristics of cervical arachnoid cyst in myelography, CT and MRI are discussed, in addition to the neurological aspects.