Continuous or discontinuous thin ring-like enhancement could be seen in secondary pseudo-arachnoid cyst.fat-suppression sequence was helpful in diagnosis of epidermoid cyst and dermoid cyst.

• 结论:鞍区不同性质的囊性病变具有一定的影像学特点，通过详细的影像学检查可对其中多数病变做出正确的定性诊断。