Fujisawa I, Asato R, Togashi K, Hayakawa K, Nakano Y, Konishi J
Department of Radiology and Nuclear Medicine, Kyoto University School of Medicine, Japan.
J Comput Assist Tomogr. 1988 Jul-Aug;12(4):644-5. doi: 10.1097/00004728-198807000-00022.
Magnetic resonance images of two cases of sellar spine are reported. The sellar spine is an anatomical variant characterized by an osseous spine that arises in the midline from the dorsum sellae and protrudes into the pituitary fossa. On short repetition time/short echo time (T1-weighted) images the sellar spine is demonstrated as a hypointense structure within the high intensity posterior pituitary. We suggest that the sellar spine is the ossified remnant of the cephalic tip of the notochord.
报告了两例蝶鞍棘的磁共振成像。蝶鞍棘是一种解剖变异，其特征是在中线处从鞍背发出的骨性棘突并突入垂体窝。在短重复时间/短回波时间（T1加权）图像上，蝶鞍棘在高强度的垂体后叶内表现为低强度结构。我们认为蝶鞍棘是脊索头部尖端的骨化残余物。
