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Objective To study the CT findings of pulmonary mucosa-associated lymphoid tissue (MALT) lymphoma. Methods The CT examinations of 12 patients with pathologically proven pulmonary MALT lymphoma were reviewed retrospectively. Evaluated imaging findings included number, distribution,shape, attenuation and other associated findings of each lesion were evaluated. Results Thirty-two pulmonary lesions, including consolidations, masses, nodules and lesions with ground glass attenuation,were identified in 12 patients. Multiple lesions were founded in 10 of 12 patients and solitary lesion in 2 patients. Multiple lesions found in one lung in 2 patients, and multiple lesions found in both lungs in 8 patients. Ten cases demonstrated 21 consolidation lesions with air bronchogram, and one of the ten cases demonstrated two lesions with airway dilatation. Three cases demonstrated 5 masses or nodular lesions, 3 of these 5 lesions showed air bronchogram. Two cases demonstrated 6 ground glass attenuation lesions. One case showed mediastinal and hilar lymphadenopathy. Conclusion Pulmonary MALT lymphoma usually appears as multiple bilateral consolidations, masses, nodules with air bronchogram or lesions with groundglass attenuation at CT imaging. The imaging findings described above and with an indolent clinical course may suggest the diagnosis of pulmonary MALT lymphoma.
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Objective To study the effect of 125Iodine seed on the rabbit ischiadic nerve at different time point after implantation. Methods Thirty healthy New-Zealand rabbits were randomly assigned into 3 groups( 2-week group, 2-month group and 4-month group) using envelope method. During operation, 10 radioactive 125I seeds were implanted randomly near one of the ischiadic nerve, while 10 non-radioactive seeds were implanted into the contralateral ischiadie nerve. According to treatment plan system(TPS),90% of the prescription dose (PD)was centered in the specific place, where the nerves were chosen to be studied. After 2 weeks, 2 months and 4 months respectively, nerve electro-physiolngy experiment was used to evaluate the bilateral ischiadic nerves, at the same time the morphology of the ischiadic nerve was examined by general observation, light microscope and electron microscope. The electron microscope photo with the same ×4000 amplification was divided into 100( 10 × 10) cages and non-specific changes in one cage account for 1%. The t test and sum rank test were used for statistics. Results Potential leaking point of experimental ischiadic nerves near heart in 2-week group ,2-month group and 4-month group were (0.52± 0.26), (0.60±0.19), (0.48±0.17)V, while that of the control sides were (0.59±0.19), (0.60± 0.15), (0.53±0.13 ) V, there was no statistical significance in the same group respectively (t=0.91, 0.03,0.67,P>0.05). Potential leak point of experimental ischiadic nerves far from heart in 2-week group, 2-month group and 4-month group were (0.51±0.15), (0.52 s0. 11 ), (0. 53±0.15) V,the control sides were (0.52±0.10), (0.56±0.12), (0.54±0.10)V, there was no statistical significance in the same group respectively (t= 0.25,0.74,0.17, P > 0.05 ). Action potential amplitude of experimental ischiadic nerves near heart in 2-week group,2-menth group and 4-month group were (13.18±4.09), (12.78± 4.42), (12.09±1.20) mV, while that of the control sides were (10.55± 4.21 ), ( 10.31±4.22), (12.88±3.54) mV, there was no statistical significance in the same group respectively (t=1.57,1.36, 0.50,P>0.05). Action potential amplitude of experimental ischiadic nerves far from heart in 2-week group,2-month group and 4-month group were (11.18±3.38), (11.68±3.21), ( 12.52±3.09) mV, while that of the control sides were (11.56±4.80), (10.71±3.40), (11.67±2.48) mV ,there was no statistical significance in the same group respectively(t=0.29,1.01,0.55, P>0.05 ). Nerve conduction velocity of experimental ischiadic nerves in 2-week group,2-month group and 4-month group were (40.56± 9.46), (38.79±5.78), (39.44±8.64) m/V, the control sides were (42.56±6.59), (44.64±7.53), (43.33±6.05)m/V, there was no statistical significance in the same group respectively( t = 0.57,1.94, 0.01,P>0.05). There were some changes in general observation and light microscope, in electron microscope, many non-specificity changes were observed. All of these changes included delamination, collapse, disaggregation of the myelinated nerve, mitochondria swelling and vacuolization of neurilemma cell and axon. The ratio of degenerative alterations in nerves was 60% --70% in 2-week group, 50% in 2-month group and 30% in 4-month group, and there was statistical significance among three groups (P<0.05). Conclusion 125I permanent plantation in our test dose has little effect on ischiadic nerve, all these non-specificity changes were observed in electron microscope, and it has no evident impacts on physiological functions.
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Objective To explore the clinical value of CT-guided 125I radioactive seeds implantation and chemical ablation for malignant retroperitoneal tumors.Methods Because of the rejection of the second surgery resection and insensitivity of chemotherapy and radiotherapy,nineteen patients with recurrent or metastasis malignant retroperitoneal tumors were treated by CT-guided125I radioactive seeds implantation according to TPS or Halarism's experienced function,and percutaneous ethanol injection was performed if the way of punctuation Was limited.The extent of pain relief was assessed one month later after therapy.All the patients received enhanced CT scan 6 months after the first treatment,and imaging evaluation wag performed according to WHO criteria.Results For the 19 patients.pain relief Was achieved more or less in all patients.Imaging evaluation revealed complete relief,partial relief,no change in 10,7,2 cases respectively.All patients are still alive now.The longest followed span is 31 months.and the shortest is 7 months,the average followed span is 13.5 months.Conclusion CT-guided 125I radioactive seeds implantation and chemical ablation ore effective for malignant retropefitoneal tumors.
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Objective: To develop novel strategies to identify relevant molecular signatures for complex human diseases based on data of identical-by-decent profiles and genomic context.Methods: In the proposed strategies, we define four relevancy criteria for mapping SNP-phenotype relationships-point-wise IBD mean difference, averaged IBD difference for window, Z curve and averaged slope for window.Results: Application of these criteria and permutation test to 100 simulated replicates for two hypothetical American populations to extract the relevant SNPs for alcoholism based on sib-pair IBD profiles of pedigrees demonstrates that the proposed strategies have successfully identified most of the simulated true loci.Conclusion: The data mining practice implies that IBD statistic and genomic context could be used as the informatics for locating the underlying genes for complex human diseases. Compared with the classical Haseman-Elston sib-pair regression method, the proposed strategies are more efficient for large-scale genomic mining.
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Objective To evaluate the short-term efficacy of the combination treatment of high intensity focused ultrasound (HIFU) with transcatheter chemoembolization or systemic intravenous themotherapy in the treatment of malignant solid tumors. Methods Eighty-four patients with malignant tumors were treated by transcatheter chemoembolization or systemic intravenous themotherapy, and then by HIFU, from July 2001 to December 2002. The clinical symptoms, organ functions (ALT、AST), and imaging findings (ECT, MRI or CT) before and after the combination treatment were compared. Results After the combination treatment, the remission rate of clinical symptoms was 92 5% (62/67). Of 56 patients with liver cancer, levels of ALT and AST reduced to normal in 58 9% (33/56) and 66 1% (37/56) of the patients, respectively. An AFP decrease ≥50% of originally numeric value was observed in 71 9% of the patients (23/32). MRI or CT findings indicated that the volume of tumor necrosis was ≥50% in 91 7% of patients (77/84), ≥80% in 61 9% of patients (52/84), and