Objective To study the value of CT and MRI(3D heavy T_2WI) in cerebrospinal fluid rhinorrhea.Methods 4 cases with spontaneous cerebrospinal fluid (CSF) rhinorrhea confirmed by operation were collected in this study.There were 2 men and 2 women.All patients underwent CT thickness was 0.625 mm and no gaps.MRI (coronal 3D heavy T2WI,thickness of 1 mm,TR/TE 5000 ms/119 ms).Results All 4 cases accepted the treatment of operations.The defects bone were showed by CT,and the sign of CSF of intracranial cavity communicated with nasal cavity diretly was showed by MRI,pituitary herniated into sphenoid sinus in one case also showed by MRI.Conclusion For spontaneous cerebrospinal fluid rhinorrhea,thin-section coronal CT scan and MR coronal 3D heavy T_2WI can clearly show the location of fistulas.

Objective To study the time-dependent changes and mechanisms of auditory cortex in prelingual sensorineural hearing loss. Methods Two groups (9-12, 19-22-year-old) of hearing-loss patients and matched normal hearing subjects received MR diffusion and MRS examination. The ROI for ADC measurement were placed on the Heschl gyrus (HG), and for NAA/Cr, Cho/Cr on the superior temporal gyrus(STG). Results There was no statistical difference among groups both in the NAA/Cr and Cho/Cr (P>0.05), Left side NAA/Cr 2.46±0.51, 2.49±0.52, 2.26±0.33;Right side NAA/Cr 2.26±0. 46, 2. 44±0. 45, 2. 27±0. 46. Left side Cho/Cr 0. 88±0. 21,0. 92±0. 18, 0. 87±0. 13 ; Right side Cho/Cr 0. 88 ± 0. 18, 0. 87 ± 0. 22, 0. 81 ± 0. 16. There was statistical difference of ADC value among normal hearing subjects and 9-12, 19-22-year-old hearing-loss patients(F = 4. 42, P < 0. 05, F = 11.37,P<0. 05). There was significant difference of ADC value between normal hearing and 19-22 year-oldhearing-loss (q = - 44. 89, P = 0. 008, q = - 54. 28, P = 0. 027) on both left and right HG, and there wassignificant difference between normal hearing and 9-12 year-old hearing-loss only on right HG (q =- 32. 54, P = 0. 000), Left side (860 ± 103), (885 ± 48), (905±77) mm<'2>/s, Right side (848 ± 73),(880 ± 61), (902 ± 52) mm2/s. Conclusion Compared with the normal hearing, the ADC value increased in 20-year-length of deafness. The NAA/Cr and Cho/Cr of STG showed no changes among the three groups.

Adult ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Neurotoxicity Syndromes ; diagnosis ; Retrospective Studies ; Tomography, X-Ray Computed

Objective To study the imaging of central pentine myelinolysis (CPM) and extrapontine myelinolysis(EPM) after liver transplantation and value of DWI. Methods Eight patients after liver transplantation with CPM and EPM were included in our study, 4 cases of female and 4 cases of male.MR examinations were performed on Philips 1.5 T MRI system. The sequences included SE T1 WI, FSE T2Wl,axial SE-EPI DWI,TR/TE 6225/118.7 ms, ETL 128, FLIP 90°, thickness 5 nun, matrix 128 ×128,b=1000 mm2/s. Results Four of B type hepatitis and cirrhosis and 1 case combined with hepatic carcinoma, 1 of C type hepatitis with cirrhosis from schistosome,2 of C type hepatitis and cirrhosis, 1 of cholangiogenic cirrhosis. MR demonstrated prolongation of T1 and T2 with a shape of butterfly, round or quadrangle on the brain stem sparing of the corticospinal tract and peripontine tissue. The lesion manifested high signal intensity both on DWI and ADC map indicating T2 effect and vasogenic edema. Follow up MR in 2 cases 2 months later showed more prolongation of T1 and T2 than the first time and the lesion manifested iso-intensity signal on DWI and high signal intensity on ADC map suggesting increased diffusivity. Abnormal signal intensities were detected on the bilateral caudate head, globus pallidus, putamen and cerebral cortex in 3 cases. Conclusion CPM should be considered when prolongation of T1 and T2 with a shape of butterfly, round or quadrangle on the brain stem, sparing of the corticospinal tract and peripontine tissue was detected for patients of pest-transplantation. When combined with other area abnormality, EPM and CPM should be considered. DWI can early and sensitively show the lesion.

Objective To observe MSCT and clinical features in patients of laryngocarcinoma combined with other primary carcinomas. Methods Five patients of laryngeal cancer combined with multiple primary cancer were enrolled in the study. Three paitents had long-term smoking history more than 20 years. Three paitents had various degree of radiotherapy, chemotherapy and immunotherapy. The second primary cancer located in right upper lung lobe in 2 patients of synchronous cancer and 1 patient of metachronous cancer. The others located in soft palate, uvula and the left side of zone Ⅱ and zone Ⅳ in the neck, respectively. MSCT and clinical characteristics were analyzed. Results Five patients of multiple primary cancers included 2 patients of synchronous cancer and three patients of metachronous cancer. MSCT found the appearances of malignant tumors in various parts in all 5 patients and cervical lymph nodes metastasis in 2 patients. Conclusion The possibility of prime laryngocarcinoma combined with other primary cancers should be considered when other organ malignant tumor was detected in patients with laryngeal carcinoma, especially in patients with history of long-term smoking, radiotherapy and chemotherapy and immunotherapy. Long-term following-up of cervix and other organs should be taken for the postoperative patients of laryngocarcinoma.

Objective To evaluate the value of MSCT in differentiate cystic lesions in different cervical region. Methods Forty cases with cyst lesions in the neck which was confirmed by pathology were collected in our study. The following diseases were excluded: cystic lesions from thyroid gland and thymus or bronchus, cystic changes of solid lesions ( necrotic lymph node) and cystic or solid lesions in the parotid gland. All patients underwent MSCT scan on GE Lightspeed 16. The parameters were following: 120 kV,260 mA, thickness 5 mm, pitch 1. 375. The delay time for contrast enhanced CT was 25 seconds for arterial phase and 60 seconds for vein phase. Results Lesions were analyzed in 4 different cervical regions including parotid gland, midline, lateral cervix and posterior cervix. Among the lesions in parotid area,2 were first brachial cyst and the other 2 were epidermoid cyst. First brachial cyst occurred intraparotid gland and epidermoid cyst occurred intraparotid or extraparotid gland. Among the lesions in midline area, 17 cases were thyroglossal cysts,81.0% were in the level hyoid bone, 12 cases of thyroglossal cysts protruded at the preepiglottic space or oral base. Another kind of lesions in midline included 3 cases of epiglottic cysts and 1 epidermoid cyst in the lower level of the neck which involved infrasternal level. The 12 cases of second brachial cysts occurred in the lateral neck. Ten cases were in the left side. Type Ⅱ was the most common type and account for 5 cases among all of second brachial cysts. Type Ⅰ and type Ⅱ were running up,accounting 3 cases respectively. Type Ⅳ account for 1 case. Two cases with lymphangioma and 1 case with third brachial cyst located at the posterior neck. Conclusion According to the location and typical imaging appearance, MSCT can do the differentiation of different cystic lesions in the different area of neck.

AIM: To evaluate the therapeutic efficacy and safety of heavy silicone oil (HSO), Densiron 68, was used as internal tamponade to treat complex vitreoretinopathy.METHODS: A retrospective study of 30 patients (30 eyes) who underwent vitrectomy and HSO tamponade for complex retinal detachment between January 2015 and January 2016.The best corrected visual acuity (BCVA), intraocular pressure (IOP), retinal reattachment and complications after surgery were observed.RESULTS: There were statistical significances in both the BCVA difference between pre-operation and HSO tamponade, and the BCVA difference between pre-operation and the removal of HSO for 3mo (z=-2.198, P=0.028;z=-2.682, P=0.007).The average intraocular pressure of HSO tamponade group was 20.233±8.007mmHg, and the average intraocular pressure of pre-operation group was 16.067±4.025mmHg, showing significant difference(t=-2.913, P=0.005).Between the pre-operation group and the HSO removed group 14.933±3.423mmHg, there was no significant statistical difference in the analysis of IOP (t=2.635, P=0.430).Anatomical success was achieved in 90% of cases after the removal of HSO.Most common complications were cataract formation and oil emulsification.CONCLUSION: Densiron-68 is a safe and effective tamponade material for the treatment of complex vitreoretinopathy.However, most common complications are cataract formation and oil emulsification.So clinicians should strictly handle indications and usage during the clinical applications.

Objective To study the MRI features of sporadic Creutzfeldt-Jakob disease(sCJD). Methods Three patients with clinically diagnosed sCJD underwent MR study,including SE T_1WI,FSE T_2 WI,and DWI sequences.The MR imaging features were analyzed.Results The lesions were not definite either in SE T_1 WI or in FSE T_2 WI,but were prominent in DWI.Abnormal hyperintensive signal appeared in the cerebral cortex,with the frontal,parietal,and occipital lobes being the mostly involved region.The subcortical white matter was normal.The bilateral caudate nuclei and thalami could also be involved.The abnormal signal could be either symmetrical or asymmetrical.There was diffuse atrophy of the brain parenchyma in the late phase of disease,especially in the cortex.Conclusion With the application of MR study,especially the DWI,combined with its characteristic clinical manifestation,the diagnosis of sCJD can be made definitely.

of left and right side cerebral cortical veins was 159.16(154.88-164.13)ppb(× 10-9), 164.61(156.23-168.04) ppb, respectively. The median susceptibility (extent) of left and right side thalamostriate veins was 160.51 (152.14-170.06) ppb, 162.48(153.47-173.66)ppb, respectively. Left were less than the right, and the difference was statistically significant (Z=-3.14,-2.02, P<0.05). And the difference of two side of other cerebral venous susceptibility had no statistical significance. The median susceptibility (extent) of right cerebral cortical veins, left thalamostriate veins and right septal veins of 22 male was 166.22(159.21-169.99) ppb, 168.65(159.19-174.45)ppb and 153.42(148.10-161.78)ppb, respectively. The coresponding positions of median susceptibility (extent) of 38 female was 161.10(155.06-167.15)ppb, 157.70(151.53-164.41)ppb and 147.52(142.94- 154.16)ppb, respectively. The susceptibility of right cerebral cortical vein, left thalamostriate vein, right septal vein of male was significantly different from the females (Z=-2.03,-2.20,-2.33, P<0.05). Futhermore, we also found that there had positive correlation between age and right thalamostriate vein(r=0.28,P<0.05). Conclusion The magnetic sensitive of the right thalamostriate vein tends to increase along with the age, and some of peoples had difference with bilateral and age.

The imaging findings of pelvic lipomatosis as confirmed by operation and pathology were examined in 1 case and two follow-up asymptomatic cases retrospectively analyzed.The imaging findings included a compressed and deformed bladder with a superior displacement.Its shape was like an inverted tear and pear in coronal view and a banana in sagittal view.Bilateral ureters were both compressed with a medial deviation.And bilateral ureters were dilated with hydronephrosis in 1 case.Rectum and sigmoid were both compressed and became narrowed.The clinical manifestations included frequent urination , urgent urination , urination pain, dysuria, constipation, nausea, vomit and fever in 1 case while another 2 cases stayed asymptomatic.