Davidson H D, Ouchi T, Steiner R E
Neuroradiology. 1985;27(4):301-3. doi: 10.1007/BF00339561.
NMR images in five patients with surgically proved, congenital germinal layer intracranial neoplasms (two dermoid and three epidermoid tumors) were reviewed. The dermoids were typically midline (suprasellar or parapineal) masses with sharply-defined margins. Relaxation times were variable, but if fat was present, T1 was decreased, and T2 was increased. The epidermoids were off the midline (cerebellopontine angle, temporal lobe, frontal lobe) masses with generally long T1 and T2 relaxation times. Obstructive hydrocephaly was noted in one patient, and tumor to ventricular communication was demonstrated in another.
回顾了5例经手术证实患有先天性颅内生殖层肿瘤（2例皮样囊肿和3例表皮样囊肿）患者的核磁共振成像（NMR）图像。皮样囊肿通常为中线部位（鞍上或松果体旁）肿块，边界清晰。弛豫时间各不相同，但如果存在脂肪，T1缩短，T2延长。表皮样囊肿位于中线以外（桥小脑角、颞叶、额叶），T1和T2弛豫时间通常较长。1例患者出现梗阻性脑积水，另1例显示肿瘤与脑室相通。
