RESUMO
Objective To investigate the clinical and CT features of basal cell adenomas (BCA)of parotid gland,and to improve the understanding of the disease.Methods Clinical and CT data of 1 8 patients with BCA of parotid gland confirmed by surgery and pathology were collected.The characteristics of age,sex,clinical symptom,lesion site,number,size,shape,density and CT dualGphase enhancement of the lesions were retrospectively analyzed.Results (1)Age and sex of onset:1 2 cases(6 6.6 7%)of age stage from 30 to 5 9,5 cases (27.78%)of the elder over 60,1 case of the younger below 29,5 cases (27.78%)for males,1 3cases (72.22%)for females,the incidence ratio of male to female being 1 ︰ 2.5.(2)Clinical manifestations:there were sporadic masses in the parotid region,3 cases were accompanied by mild pain and all patients had no facial nerve symptoms.(3)Location site,number,size:23 lesions in 18 cases, of which 15 cases (83.3%)were single and 3 cases (16.7%)had multiple lesions on one side.17 lesions (73.9%)were located in superficial lobe, and 6 lesions (26.1%)were located in the deep lobe;(4)Shape and cross section diameter:the shape of the tumor was round or ellipse with wellG defined margin,13 cases (56.5%)of the round shape,10 cases (43.5%)of the ellipse;the maximum cross section diameter was (2.49±1.3 8)cm,the superficial lobe group was (2.05 ±1.02)cm,and the deep lobe group was (3.73 ±1.59)cm.The difference between the two groups on the maximum cross section diameter was significant (P＜ 0.05).(5)Density:the density of most lesions was heterogeneous.17 lesions were accompanied by central or peripheral cystic degeneration of varying degrees,of which 10 lesions with cystic regions ＞ 50% and 2 lesions with maximum transverse diameter ＜ 0.8 cm.(6)CT dualGphase enhancement:19 lesions showed obvious homogeneous or heterogeneous enhancement on the arterial phase,and persistent enhancement on the venous phase.4 lesions showed progressive heterogeneous enhancement,and the enhancement degree of venous phase was even higher than that of arterial phase.Conclusion The BCA of the parotid gland aremainly occuring in middleGaged and older women,displaying regular shape of lesions,developing to cystic degeneration easily and presenting＂fastGelevation and sustained enhancement＂or progressive enhancement patterns in the dualGphase enhanced scans.These characteristics are helpful to make a diagnosis preoperatively.
RESUMO
Objective To analyse the changes of cerebral cortical thickness and explore the connectivity of cortical thickness and the clinical syndrome of concomitant strabismus using high-resolution magnetic resonance imaging.Methods Participants were 26 children with primary strabismus and 28 healthy children strictly matched for sex, age, education and socioeconomic level.By using Freesurfer software, the whole-brain-based analysis was perfomrmed to compare the cortical thickness between the two groups.Results Compared with the healthy control group the children with strabismus were found that the cerebral cortex became thinner, including these brain regions related with stereovision,advanced visual-attention,attention and executive control function,as well as brain areas in insula and cingulate circuit.Conclusion Concomitant strabismus in children are not only caused by pathological changes of extraocular muscles,but anatomical changes of the central nervous system, especially the brain areas involved in the advanced visual processing related with visual-motor and visual-attention, and the advanced cognitive brain regions associated with attention and executive control, as well as the anatomical changes in insula and cingulate cortex circuit, which can explain the clinical syndrome of children with concomitant strabismus.