Objective To study the effects of basic fibroblast growth factor (bFGF) and Gingkgo biloba extra(GbE) on experimental cerebral infarction. Methods 40 healthy adult cats were equally devided into group A with sodiumchloride, group B with bFGF, group C with GbE and group D with bFGF+GbE in random.All animals were operated to establish the feline models of cerebral focal ischemia-reperfusion by the approach of left transorbital. The certain madicine intervene were take at 0 h,24 h,48 h after the models established.The neurological defects score was evaluated by Philips' criteria score in 1 d and 7 d. The physiological changes were observed by HE stained and electron microscope.Results The neurological defects score was singificiant lower in D group(41.50?8.18) than that in group A(82.20?8.08),B(63.60?6.22) and C (61.00?6.58)(allP

Objective To compare the X-ray features between Hirschsprung alied disease (HAD)and Hirschsprung disease ( HD), and analyze the differentiations. Methods From December 2004 to December 2009, nineteen cases of HAD, aged from 30 days to 10 years (median, 14 months), received barium enema examinations in our institution. Other 19 cases with HD, also received barium enema examinations, were chosen randomly. They were aged from 42 days to 8 years ( median, 8 months). The imaging features of HAD and HD were analyzed retrospectively. The incidence rate of colon stenosis,"truncation sign" and spasm notch and R/C ratio (the longest diameter of rectum/colon) were calculated and compared between these two groups. In all these cases, diagnosis was confirmed by postoperative histopathology. The position of barium retained was also evaluated. These parameters of both groups were compared by x2 and Fisher test. Results There was statistical significance in the incidence rate of colon stenosis between HAD (9/19) and HD (18/19) (x2 = 10.364, P ＜0.01). However, there was no statistical significance in "truncation sign" and spasm notch between HAD (4/19 and 3/19, respectively)and HD ( 1/19 and 1/19, respectively) (P ＞0. 05 for both). R/C ratio was 0. 42 ±0. 15 in HAD group and 0.29±0. 12 in HD group, and there was statistical significance between them (t =2.892,P＜0.01). In HAD group, barium retained in distal sigmoid colon in 1 case (1/19), in distal descending colon in 7 cases (7/19), in distal transverse colon in 1 case (1/19), in total colon in 6 cases (6/19); However, in HD group, barium retained in distal rectum in 3 cases (3/19), in distal sigmoid colon in 13 cases ( 13/19), in distal descending colon in 3 cases (3/19). Conclusions There were some differences in the imaging features between HAD and HD though they presented similar clinic experience. HAD cases presented a lower incidence rate of colon stenosis and a higher R/C ratio than HD cases. In HAD cases, the most common site of barium retained is distal descending colon, while in HD cases, it is distal sigmoid colon.

OBJECTIVE To investigate the HRCT and MRI characteristic of external auditory canal cholesteatoma(EACC)in children.METHODS A total of 40 patients(45 lesions)with EACC confirmed by pathology were retrospectively analyzed with HRCT and MRI characteristics and clinical therapeutic value.Imaging findings of 40 patients(45 lesions)with EACC were retrospectively analyzed.RESULTS Soft tissues were found in all the external auditory canal(EAC).Of the forty-five soft tissues,7 manifested as inhomogeneous strip soft tissues and 38 as lesions solid soft tissues;30 located in medial part of the EAC and covered the tympanic membrane,while the other 15 presented as tympanic membrane perforation and involved the tympanic cavity.The MRI of the 3 ears showed high signal on T2/T1 iso-intensity,high signal on DWI,and low signal on ADC.Normal whole bony EAC was observed in 17 cases and enlarged medial EAC in 28 cases.Seven cases only involved in the superior wall,but 38 cases displayed as multiple bone wall involved,of which 6 involved in circumferential walls.Thirty-three cases displayed atactic ear bone margin,11 displayed blunted or disappeared drum shield plate.Destroy of long crus of incus and manubrium mallei occurred in 15 cases,of short crus of incus in 8 cases,of stapes in 2 cases,and mastoiditis in 5 cases.According to the pneumatization degree of mastoid air cell,37 cases were classified into pneumatic type,7 cases into mixed type,and the last one into diploic type.CONCLUSION The children EACC tends to be limited and rarely involved in middle ear and mastoid process.No patient with peri-ear infection was found.Application of HRCT and MRI help accurate location and determination of cholesteatoma.According to the extent of the lesion,selecting the appropriate surgical method is an effective method to remove cholesteatoma,improve hearing and reduce recurrence.

Objective:To enhance comprehension of undifferentiated embryonal sarcoma of the liver(UESL)in children by analyzing ultra-sound,CT,and MRI imaging features.Methods:A retrospective analysis was conducted on 11 cases of UESL in children,confirmed through surgery and pathology,at the Children's Hospital,Affiliated Capital Institute of Pediatrics from December 2009 to December 2021.We ana-lyzed the ultrasound,CT,and MRI imaging features of all patients and summarized their characteristics.Results:All 11 cases presented with solitary hepatic masses ranging from 11.5 to 19.8 cm in diameter.Imaging manifestations of UESL correlated with component proportion and distribution within the masses.Lesions displayed clear boundaries in all cases.CT scans revealed mixed low density in 11 cases,with ir-regular floc soft tissue density shadows observed at the edge of cystic density areas or around partitions in a few cases.Ultrasound images of all six cases showed solid space-occupying masses,with varying sizes of anechoic regions within the solid mass.MRI T1WI showed mixed low intensity signal in three cases and strip/large high intensity signal areas in the lesion.T2WI revealed mixed high intensity signal and strip low intensity signal areas in 3 lesions.In the arterial phase,lesions displayed slightly to moderately heterogeneous strip/patch enhancement,primarily marginal enhancement in nine cases and thickened,tortuous arterial shadows in eight cases.In the delayed phase,lesions showed continuous uneven enhancement,with enhancement at the edge and peripheral-to-central filling observed in eight cases.Additionally,the enhancement range continuously increased in eight cases,with the false capsule sign identified in eight cases in the delayed stage.Conclu-sions:Imaging features of UESL in children exhibit distinct characteristics.Understanding these features,in conjunction with clinical findings,may aid in early diagnosis.

Objective:To explore the MR enterography (MRE) features of intestinal Behcet disease (BD) and Crohn disease (CD) in pediatric patients.Methods:This study was a cross-sectional study. The BD patients and CD patients were retrospectively enrolled from Children′s Hospital Affiliated to Capital Institute of Pediatrics from January 2019 to October 2022. There were 17 children with intestinal BD, including 6 males and 11 females, aged 5-12 (8.4±2.6) years, and 23 children with CD, including 15 males and 8 females, aged 7-15 (10.2±2.7) years. The MRE images were observed, and the evaluation contents included the diseased intestine (terminal ileum, ileum+ascending colon, ileum+ascending colon+transverse colon, whole colon), the form of intestinal wall thickening (uniform/eccentric thickening), MRI signal (fat suppression T 2WI, DWI), the enhancement mode (uniform/layered enhancement), intestinal stenosis, intestinal dilatation, mesentery comb sign, mesentery fatty fibrosis, lymph node enlargement, and the extraintestinal complication (anal fistula, fluid collection). The comparison of MRE signs between groups was performed using the χ2 test or Fisher exact test. Results:All children were completed MRE examination with good intestinal filling, and no adverse reactions. The significant differences were found in the scope of the diseased bowel, the form of intestinal wall thickening, DWI signal, intestinal dilatation, lymph node enlargement, anal fistula and fluid collection between the intestinal BD and CD patients ( P<0.05), while no significant differences were found in the fat suppression T 2WI signal, enhancement mode of the lesion, intestinal stenosis, mesentery comb sign, and mesentery fatty fibrosis ( P>0.05). Conclusion:MRE is safe and effective, and there are certain significantly different MRE features between children with intestinal BD and CD.