ABSTRACT
Objective To provide the detailed anatomic data of clinoid space for skull base surgery. Methods The anatomical structures and the adjacent structures of anterior clinoid process and clinoid space of 10 adult cadaver head specimens were observed under operating microscope. Thin slices of 0.05 mm were gotten on axial, coronal and sagittal planes from 3 of these 10 adult cadaver head specimens by freezing drilling technique. Sequential tracking was performed to observe the anatomical structure of clinoid space. Results Clinoid space is an useful space after drilling the anterior clinoid process. On the base, there is strut, clinoid portion of ICA and the anterior roof of the cavernous sinus.Cranial nerves of Ⅲ, Ⅳ, Ⅴ and Ⅵ were found beside the anterior clinoid process. This sclices of 0.05 mm by freezing drilling technique could fully demonstrate the anatomical structures clinoid space.Conclusion Micro-sectional anatomical methods can demonstrate the anatomical characteristics of the clinoid space, which provides detailed anatomical data for skull base operation.
ABSTRACT
Objective To observe the MRI features of traumatic brainin jury to corpus callosum and provide valuable diagnostic information for clinical application. Methods Clinical and radiological data were retrospectively analyzed in 20 MRI-diagnosed patients as having traunmtic brain mjury to corpus callosum. Results Traumatic injury to corpus callosum was rather rare in brain trauma.Most traumatic injury to corpus callosum was non-hemorrhagic and its lesion mainly laid at its body or splenium,sometimes at genu,but rarely at rostrum.Traumatic injury to corpus callosum,being one of the common manifestations in diffuse axonal injury(DAI), could be demonstrated slight hyperintense signal on TI WI and T2WI in early phase.The injury site shrank and liquefaction necrosis appeared in the lesion at the late-mid-injured period with softened focus or gliai scar.MRI showed hyperintense T1 and T2 signal, similar to the signal of the cerebrospinal fluid and demonstrated ventriculomegaly in the corresponding parts.DWI showed hyperintense signal in the lesion in acute and subacutc stages:with time prolonged,isointense signal of the normal brain tissue was found and signal of the cerebrospinal fluid appeared in the present of softened focus.Conclusion Attention should be paid to the traumatic injury to corpus callosum,an indicator for severe trauma or disease.MRI,a sensitive and multi-directional imaging,is superior in detecting non-hemorrhagic injury to the corpus callosum.