| Objective: Cadaveric heads were dissected under operation microscope in order to clarify the anatomical relations of CS and its adjacent structures.To get Chinese data of individual anatomical relations of bones,nerves,vessels and duramater in the areas of sella turcicas by statistics and analysis.To provide the important anatomical parameters of the areas of sella turcicas for neuroendoscopic approach.To clarify the concept of CS and provide the anatomical bases for improving the approaches. Methods: The CS and its adjacent structures of 22 adult cadaveric heads were dissected in deferent approaches and deferent angles under operation microscope. The minute portions were measured in wax fixed. Results 1 In our groups, only 2 sides(4 55%) specimens formed caroticoclinoid foramens and only 2 sides(4 55%) formed interosseous bridges MCP was not found frequently and obviously. The pterion approach was 10-15mm shorter than the subfront to the areas of sella turcicas. 2. The number of SMCV terminative branches was 1-3 mostly The entrances of SMCV terminative branches to the duramater located on 9.47Id.67(-5.02-2S 54)mm before ACP top and 3.83～0.52(0-1 1 .26)mm below sphenoid ridge. The diameters entrances of SMCV terminative branches was 2.47～0.17 (098-5.98) mm. There were 3 main types about SMCV terminative branches to the duramater. They were the type of cavernous sinus, the type of lateral wall of cavernous sinus and the type of abnormal sinus in middle cranial fossa. The approaches could been affected by the final entrances of SMCV to sinus via Parkinson and Mullan triangle. 3. The shape of ACP was pyramidal. The length, width and thickness were 9.39f0.23(7 42-1 2.08)mm , 12.1 %0.32(8.98- 1 7.50)mni , 5.31～0. 18(3.20-7.62)mm respectively. The CPA could be ground in extra- and intradural combined and attention should paid to protect the cranial nerves below it. The frequency of occurrence of ACP apex artery was 22.730/0(10 sides), and the diameter of ACP apex artery was 0.78～0.24(0. 18-1 .32)mm. 4. The sharp of CS was wedge. The top, base, medial, lateral, inferior sides and the height of CS were 2.39 ?0.18(0.63-4.l0)mm, 5.34～0.16(2.62-7.00)mm, 7.67 +0.33(4.0Ol7.00bo ll.2l 10.49 (4.00l4.00)nUn, l0.00t0.32(5.6-l4.00bo and 7.87t0.35(5.00-l6.0bo m pe of cs coere bo whed trr the reledonstw orICA ana Cr^. m tw orA was the ~ ana it we edt to ~on. Bom thedistal and PrOximal were incombo and the cs was the StrUCthe of bousm. l5. The anteriowt aPPrOaC of carvemous - via cs could get an excellenfield vision to the areas of sella theicas and once for all removal for large inVaShephawi adenOIna coul been aChieVed by extw and od combined aPProach. Theonglns Of W wtes bo C2 ~ of ICA were in the way of forg theICA. OPe the OPti od can reease the bos.CoadUSbo: The results aboVe Provided the detail data of cs and benfited thewt to the m of sella triicas, carvemous smus and adjaCen haUres. Thedata aiso pe an pe anaAnal bass for --c 'keyhole'aPProwt and endON-assisted ndcroewtw Nns tO the rm of sellatheicas The CS conceP was clanfied and it will dbo the aPPrOaChes. A new aPpoaChwas Pat in fOr once fOr all remOV lop bo pitultw adenmas...
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