Pineal cyst: a review of clinical and radiological features.

Pineal cysts (PCs) are benign and often asymptomatic lesions of the pineal region that are typically small and do not change in size over time. PCs appear as small, well circumscribed, unilocular masses that either reside within or completely replace the pineal gland. This article reviews and discusses the characteristic features of PCs-clinical, histological, and identifiable by various imaging modalities-which assist clinicians in narrowing the differential diagnosis for pineal lesions.