ABSTRACT
Objective@#In order to improve the accuracy of preoperative diagnosis, the value of MRI in the diagnosis and differential diagnosis of the mediastinal neuroganglionic tumors in children was explored.@*Methods@#A retrospective analysis of 41 cases of pathologically proven mediastinal neuroganglionic tumors[GN 19 cases, 6 cases of ganglion neuroblastoma (GNB), 16 cases of neuroblastoma (NB)]was conducted.The MRI characteristics and clinicopathological features were analyzed, including age, size, shape and boundary of tumor, MRI plain scan and enhanced signal characteristics, compared with postoperative pathology.@*Results@#The average age of the 19 cases of GN was 3.9 years, the maximum diameter of the tumor was 7.3 cm, 12 cases of tumor morphology, 18 cases of clear border, 11 cases of tumor interlinking with vertebral canal, 0 case with multi nodular fusion, 12 cases with lengthwise tumor, 11 cases with low signal in T1WI, 12 cases of uniform high signal in T2WI, and 2 cases with hemorrhagic necrotic cysts and cystic degeneration.In 6 cases of GNB and 16 cases of NB, the above-mentioned signs were 4.1 years old, 1.9 years old, 6.8 cm, 6.4cm, 2, 6; 5, 12; 3, 15; 2, 10; 3, 12; 0, 4; 3, 9; 2, 11; 1, 2; 5, 9; 0, 7, there were statistically significant differences in age of onset(F=4.145; P=0.024), relationship between tumors and vertebral canal(P=0.023), hemorrhagic necrosis and cystic degeneration(P=0.001), multiple nodule fusion(P=0.000), plain T1WI signal(P=0.015), and associated metastasis(P=0.000). There were no statistically significant differences in tumor size(F=0.363; P=0.698), tumor shape(P=0.277), boundary(P=0.221), lengthwise growth(P=0.401), plain scan T2WI signal(P=0.835), intensifying degree(P=0.338), whether the tumor had capsule(P=0.423).@*Conclusion@#The onset age of benign GN is significantly larger than that of NB, T1WI plain scan is mostly low signal, after enhancement, mainly with mild strengthening, GNB and NB tumor shape is irregular, NB is mainly multi nodular fusion, which easy to occur hemorrhage and necrosis cystic change, T2WI is mainly mixed high signal, mostly moderate or clear uneven enhancement, NB is prone to invasion of the spinal canal and distant metastasis.
ABSTRACT
Objective In order to improve the accuracy of preoperative diagnosis ,the value of MRI in the diagnosis and differential diagnosis of the mediastinal neuroganglionic tumors in children was explored .Methods A retrospective analysis of 41 cases of pathologically proven mediastinal neuroganglionic tumors [GN 19 cases,6 cases of ganglion neuroblastoma ( GNB), 16 cases of neuroblastoma ( NB)] was conducted.The MRI characteristics and clinicopathological features were analyzed , including age, size, shape and boundary of tumor , MRI plain scan and enhanced signal characteristics,compared with postoperative pathology.Results The average age of the 19 cases of GN was 3.9 years,the maximum diameter of the tumor was 7.3 cm,12 cases of tumor morphology ,18 cases of clear border,11 cases of tumor interlinking with vertebral canal ,0 case with multi nodular fusion ,12 cases with lengthwise tumor,11 cases with low signal in T1 WI,12 cases of uniform high signal in T 2 WI,and 2 cases with hemorrhagic necrotic cysts and cystic degeneration.In 6 cases of GNB and 16 cases of NB,the above －mentioned signs were 4.1 years old,1.9 years old,6.8 cm,6.4cm,2,6;5,12;3,15;2,10;3,12;0,4;3,9;2,11;1,2;5,9;0,7,there were statistically significant differences in age of onset (F＝4.145;P＝0.024),relationship between tumors and vertebral canal(P＝0.023),hemorrhagic necrosis and cystic degeneration (P＝0.001),multiple nodule fusion ( P＝0.000), plain T1 WI signal ( P ＝0.015 ), and associated metastasis ( P ＝0.000 ).There were no statistically significant differences in tumor size(F＝0.363;P＝0.698),tumor shape(P＝0.277),boundary(P＝0.221),lengthwise growth (P＝0.401),plain scan T2 WI signal( P＝0.835),intensifying degree (P＝0.338),whether the tumor had capsule (P＝0.423).Conclusion The onset age of benign GN is significantly larger than that of NB ,T1 WI plain scan is mostly low signal,after enhancement ,mainly with mild strengthening ,GNB and NB tumor shape is irregular ,NB is mainly multi nodular fusion ,which easy to occur hemorrhage and necrosis cystic change ,T2 WI is mainly mixed high signal,mostly moderate or clear uneven enhancement ,NB is prone to invasion of the spinal canal and distant metastasis.