Radical resection rate is still low nowadays. lobus quadratus resection is helpful to select the operation.

目前根治性切除率仍较低，肝方叶切除对最后选定手术方式有一定帮助。

Abstract:Objective To explore the development regularity of nitire oxide synthase(NOS) positive neurons in the lobus frontalis of the cerebrum of human fetus.

摘 要：目的：探讨人胎大脑额叶一氧化氮合酶（NOS）阳性神经元发育的规律。

The main surgical methods are change of side lobus, glandulae thyroideae, excision of thyroid isthmus and excision of the whole side lobus glandulae thyroideae.

手术方式主要采取患侧腺叶、峡部切除及对侧腺叶次全切除术。