Objective To compared the characteristics of cerebrovascular pathological changes in cerebral infarction patients accompanied with hyperhomocysteinemia (HHcy) and primary hypertension.Methods The level of homocysteine (Hcy) of 258 cerebral infarction patients with primary hypertension were detected, and patients were divided into H type hypertension group and hypertension group according to the level of Hcy.The cerebrovascular pathological changes were observed by DSA.Results There were 112 cases in H type hypertension group, and 146 cases in hypertension group.There had no significant difference between the two groups in gender, age, systolic pressure, diastolic pressure, and the rates of drinking and smoking (all P>0.05).Internal carotid artery (ICA) and middle cerebral artery (MCA) were involvements, and it was mainly with intracranial artery stenosis in the two groups.Compared with hypertension group, the rates of intracranial vessel lesion and severe cerebrovascular stenosis in H type hypertension group were significantly increased, and the rate of collateral vessels was significantly decreased(all P<0.05).Conclusion The stenosis of cerebrovascular seems much more narrower, heavier, and have less collateral circulation in cerebral infarction patients with H type hypertension.

This article reviewed hot spot and problems in the research of the senile dementia,and proposal the researching thoughts and the tentative treament plan of this disease.

The velocity of blood in vessels is an important indicator that reflects the microcirculatory status. The core of the measurement technology, which is based on spatiotemporal (ST) image, is to map the cell motion trace to the two-dimensional ST image, and transfer the measurement of flow velocity to the detection of trace orientation in ST image. This paper proposes a trace orientation measurement algorithm is based on Randomized Hough Transformation and projection transformation, and it is able to estimate trace orientation and flow velocity in noisy ST images. Experiments showed that the agreement between the results by manual and by the proposed algorithm reached over 90%.
Algorithms ; Blood Flow Velocity ; Humans ; Microcirculation ; Spatio-Temporal Analysis

We review the proceedings on the methods of how the aromatase inhibitor maintains its function, the recently developed drugs and the progress in the field of endocrine therapy for human breast cancer

Autoimmune Lymphoproliferative Syndrome ; Humans

Adult ; Aged ; Carcinoma ; Humans ; Middle Aged ; Nasopharyngeal Neoplasms ; diagnosis ; pathology ; therapy ; Neoplasm Recurrence, Local ; therapy ; Salvage Therapy ; Young Adult

Objective To investigate short-term effects of laparoscopic liver lobectomy for the treatment of hepatocellular carcinoma. Methods A comparison was made between 17 cases of laparoscopic liver lobectomy (segmentectomy) (Laparoscopic Group) and 22 cases of open hepatectomy (Open Group) from January 2001 to June 2004. The operative time, blood loss, blood transfusion amount, liver functions and blood picture before and after the surgery, and complications between the two groups were compared respectively. Results The operative time was longer in the Laparoscopic Group (median, 300 min) than in the Open Group (median, 145 min) ( u =107.05, P =0.023). Both groups presented a similar appearance in the blood loss and the blood transfusion amount. Serum levels of bilirubin and ALT varied within narrower limits in the Laparoscopic Group than in the Open Group. No significant difference was seen in blood pictures before and after the surgery in both groups. No complications happened in the Laparoscopic Group, whereas 4 cases of complications were observed in the Open Group (1 case of incision infection, 1 case of hydrothorax, 1 case of subphrenic dropsy, and 1 case of postoperative bleeding). Conclusions Laparoscopic liver lobectomy (segmentectomy) for hepatocellular carcinoma is minimally invasive, safe and effective.

Adolescent ; Gene Rearrangement ; Humans ; Leukemia, Myeloid, Acute ; etiology ; genetics ; Male ; Precursor Cell Lymphoblastic Leukemia-Lymphoma ; complications ; genetics ; Receptor, Platelet-Derived Growth Factor beta ; genetics

Local recurrent nasopharyngeal carcinoma(NPC) presents a troublesome challenge to radiation oncologist. Reirradiation is the primary modality nowadays. However, clinical data on reirradiation are still relatively scarce. This article summarized the treatment advances and the clinical characteristics associated with relapse of NPC, and reviewed the outcomes of different radiation techniques in the management of recurrence of NPC, i.e. conventionalradiotherapy, stereotactic radiotherapy, brachytherapy, three-dimensional conformal radiotherapy and intensity modulate radiotherapy, or some combination of above in recent years.

Objective To investigate MR imaging findings of hepatic focal nodular hyperplasia (FNH) on unenhanced and dynamic contrast enhanced scans and evaluate their diagnostic value. Methods The unenhanced and dynamic gadolinium enhanced MR images of 22 FNHs proved by pathology were retrospectively analyzed. Results Average size of FNH lesions was 4.05 cm. The typical MR isointensity signal with surrounded hepatic parenchyma on T 1 and T 2 weighted images was seen in only 4 lesions, while atypical signal was encountered in 18 lesions. A central scar was noted in 8 lesions on unenhanced images. After gadolinium administration, 21 lesions had vigorous enhancement on arterial phase and prolonged enhancement on portal vein and delayed phase. The ring enhancement of capsule was noted in 2 lesions on portal vein and delayed phase. 18 lesions showed a central scar on dynamic contrast enhanced images. 19 lesions were correctly diagosed by using the combination of unenhanced and dynamic contrast enhanced MR imaging. Conclusion The combination of unenhanced and dynamic contrast enhanced MR imaging can fully show the pathologic characteristics of FNH and improve to differeniate ability from other malignant hypervascular tumors.