1. For the anterior communicating artery aneurysm or post communicating artery aneurysm, MIP and SSD techniques should be used for further diagnosis.

2. Objective To discuss the microsurgical treatment of anterior communicating artery aneurysms ( ACAA ) via the supraorbital keyhole approach.

3. Though there was no anterior communicating artery in most of thecerebral arterial circles, they appeared as complete circles.

4. Ruptured aneurysms from anterior communicating artery were more easier to lead to severe clinical outcome.

5. The aneurysms of anterior and posterior communicating artery were treated and proved by microneurosurgical operations.

6. Methods:Anterior communicating artery complex of ninety cerebral hemispheres from 45 formalin fixed adult cadavers were dissected under microscope.

7. Objective:To study the micro anatomical characteristics and surgical significance of the cistern of posterior communicating artery.

8. Results: (1) The incidence of SAH was higher in anterior cerebral, middle cerebral artery aneurysms and anterior communicating artery aneurysms, compared with those at other sites.

9. Objective To summarize the experiences with LEO self-expanding stent-assisted coil embolization in the treatment for wide-necked aneurysms in posterior communicating artery.

10. The paper reports the direct operation on aneurysms of anterior communicating artery in 18 cases and discusses the pathogenesis and the optative technique of these aneurysms.

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11. Objective: To summarize the cerebral angiograms of 39 cases with anterior communicating artery aneurysm treated with microneurosurgical method.

12. Objective To introduce the operative experience of the pterional approach for treating anterior communicating artery(ACoA) aneurysm so as to improve operative outcomes.

13. Results The blood supply of optic nerve comes mainly from internal carotid, anterior artery and anterior communicating artery.

14. Objective: study the micro anatomical characteristics and surgical significance of the cistern of posterior communicating artery.

15. Objectives To explore the operative technique of clipping the anterior communicating artery aneurysms via the transorbital keyhole approach and its curative effect.

16. Objective To study the microsurgical anatomic feature of the posterior communicating artery (PcoA).

17. Objective To study the cerebral angiographic features of anterior communicating artery aneurysm (ACoAA).

18. Results The blood supply of optic nerve came mainly from internal carotid, cerebral anterior artery and anterior communicating artery.

19. The autopsy records and clinical materials in 8 cases of ruptured aneurysms of the anterior communicating artery (ACoA)were analyzed.