手术所见 :偏下方肿物位于延、颈髓交界前方并突向右侧 ,穿刺抽出浓稠乳白色液状内容物 1ｍｌ ;另一同类肿物位其上端突向枕骨大孔上方 ,与之不通 ,电灼剪断Ｃ1右侧神经根后切除之。 2个囊肿大小分别为 2ｃｍ× 2ｃｍ× 1.5ｃｍ、1.5ｃｍ× 1ｃｍ×2ｃｍ。病理所见 :囊壁由纤维 Surgical findings: the lower part of the tumor is located in the extension of spinal cord junction in front of and suddenly to the right, the punctate out of a thick creamy white liquid content 1ml; another similar level of its upper body protruding above the foramen magnum above, unreasonable, Electrosurgical cutting C1 right nerve root excision. The size of the two cysts were 2 cm × 2 cm × 1.5 cm, 1.5 cm × 1 cm × 2 cm, respectively. Pathological findings: the wall from the fiber