2.A dosimetric comparison of intensity-modulated radiotherapy versus conventional tangential irradiation for breast cancer after breast-conserving surgery
Cancer Research and Clinic 2010;22(3):182-185
Objective To evaluate the dosimetric benefits of intensity-modulated radiotherapy (IMRT) for early stage breast cancer after breast-conserving surgery. Methods Ten patients with stage Tis~2N0M0 breast cancer receiving breast-conserving surgery were selected for the study. Six cases were on the left, four were on the right. A dosimetric comparison of IMRT with conventional wedged tangential technique was performed on each patient using three dimensional treatment planning. The total prescribed dose for both plans was 50 Gy/25 fractions. Dose volume histograms (DVH) were used to compare the planning target volume (PTV) and organs at risks(OARS). Results The PTV coverage in IMRT plan was similar to that of the conventional plan (97.83 % vs 97.61%). A better dose uniformity throughout the whole breast was achieved by IMRT plan. The percentage of PTV receiving less than 95 % prescribed dose and more than 103 % prescribed dose (inhomogeneity index IHI), decreased from 25.42 % to 2.71%: the percentage of PTV receiving more than 105 % prescribed dose (V105 %) decreased from 25.79 % to 1.08 %. A better amelioration of IHI and reduction of V105 % in IMRT plans were observed in the relatively large PTV subgroup. The Dmean and percentage of volume receiving more than 30 Gy (V30) of heart from 6.72 Gy to 4.95 Gy, and from 7.23 % to 1.04 %. the Dmean and percentage of volume receiving more than 20 Gy (V20) of ipsilateral from 9.19 Gy to 7.65 Gy, and from 22.34 % to 20.18 %; the Dmean of contralateral breast decreased from 5.12 Gy to 3.52 Gy;the Dmean of contralateral lung decreased from 2.76 Gy to 1.79 Gy; the Dmean of liver decreased from 7.23 Gy to 1.04 Gy for right side patients. Conclusion Forward planning IMRT based on a standard tangential beam arrangement significantly improves the dose homogeneity throughout the target volume of intact breast and reduces the dose to OARS, especially in patients with large breast volumes who might be proposed as candidates of IMRT for intact breast.
3.Stability of glycated hemoglobin measurement in whole blood with routine methods
Donghuan WANG ; Chuanbao ZHANG
Chinese Journal of Laboratory Medicine 2009;32(10):1178-1182
Objective To investigate the stability of glycated hemoglobin HbA1c in whole blood sample measured by Tosoh G7, Roche/Hitachi 7170A and NycoCard READER Ⅱ under different storage conditions. Methods Three whole blood samples (EDTA anticoagulated) with different glycated hemoglobin levels and one whole blood sample (heparin anticoagulated) were collected and stored at -80 ℃, -20 ℃, 4 ℃,room temperature(15 -25 ℃), and 37 ℃ HbA1c was analyzed by each method on days 1, 2, 5, 7, 9, 14, 21,28, 35, 42, 49, 56, 63 and 70 respectively. Results The results of sample stored at -80 ℃ appear to be stable for Tesoh G7 and Roche/Hitachi 7170A method. The coefficients of variation (CV) for Tosoh G7 was 0.54%-1.22%. The CV for Roche/Hitachi 7170A was 0.86% -1.82%. When samples was detected with Tosoh G7 method, the results was consistent when the sample was stored at -20 ℃ for 14 days, 4 ℃ for 63 days, room temperature for 5 days, and 37 ℃ for less than 1 day. When samples was detected with Roche/Hitachi 7170A method, the results was consistent when the samples was stored at -20 ℃ for 21 days, 4 ℃ for 42 days, room temperature for 7 days, and 37 ℃ for less than 1 day. The NycoCard READER Ⅱ showed stability at 4 ℃ for 9 days, and room temperature for less than 1 days. Conclusions The stability of whole blood samples is dependent on different methods. Storage time under different temperatures is different.
4.Amnioreduction in management of twin-twin transfusion syndrome
Chinese Journal of Perinatal Medicine 2009;12(3):194-196
Objective To find out the clinical outcomes of twin-twin transfusion syndrome (TTTS) after aminioreduction. Methods Twenty-nine pregnancies with TTTS delivered in Beijing Gynecological and Obstetric Hospital from Nov. 1, 2002 to Sept. 30, 2007 were recruited. The effect of gestational age at the onset, the degree of TTTS and amnioreduction therapy on the fetal outcomes were compared. Results All of the 8 cases with the onset of TTTS before 26 weeks without treat- ment were lost, but 4 out of the 6 with the onset after 26 weeks survived (P=0. 015). Among the 9 cases received amnioreduction, 4 out of the 5 with onset before 26 weeks survived, and significant difference was found compared to those untreated ones (P= 0. 007), but no difference was shown when compared with those developed after 26 weeks(4/4)(P= 1. 000). The average delivery weeks in the untreated ones was earlier than those received treatment E(28.7±4.7)weeks vs (33.2±4.9) weeks, P=0. 001]. Amnioreduction improved the umbilical cord blood flow. For severe TTTS(stage Ⅲ~Ⅳ) with the onset before 26 weeks, the survival rate after amnioreduction was significantly high- er than those untreated ones[4/5 vs 0/5, P=0. 048)]. Conclusions Aminioreduetion is effective in improving the cord blood flow, prolonging the pregnancies, and achieving a higher fetal survival rate.
5.Expression of protein in cervical minimal deviation adenocarcinoma
Cancer Research and Clinic 2008;20(4):237-240
Objective To study the valuable index for the diagnosis of cervical minimal deviation adenocarcinoma(MDA).Methods Immunohistochemical EnVisionTM two-step method was used to evaluate the expression of CEA,Ki-67,p16,MUC6,MUC5AC,ER,PR,α-SMA in 9 samples of MDA.12 normal cervical gland tissues and 21 other types of cervical adenocarcinomas were as controls. Results The expression of CEA,MUC6,α-SMA protein in MDA(positive ratio orderly 66.67%,77.78%,88.89%)was higher than that of normal cervical gland(0,8.33%).The average Ki-67 labeling index in MDA(21.03±5.46)was also higher than that of the normal group(0.12±0.08).But as to the expression of ER and PR,the former was lower than the latter.All the differences had statistical significance (P<0.05).The expression of p16,MUC5AC had no statistical significance between the two groups(P>0.1).The ratio of positive expression of MUC6 protein in MDA(77.78%)was higher than that of the other types of adenocarcinomas(14.29%),with the expression of p16(11.11%)lower than the latter(71.43%).All the differences had statistical significance(P<0.01).The expression of CEA,Ki-67,MUC5AC,ER,PR,α-SMA had no statistical significance between the two groups(P>0.05).Conclusion Immunohistochemical positive detection of CEA,Ki-67,MUC6,α-SMA perhaps make for the diagnosis of cervical MDA.The absence of ER,PR of gland cells also support MDA.Overexpression of p16 may play an impo~ant role on the occurrence and the development of some usual adenocarcinoma of cervix,but perhaps not in MDA.
6.Ultrastructural characterization of macular pucker
Chinese Journal of Ocular Fundus Diseases 2001;17(1):52-54
Objective To study the ultrastructure of macular pucker (MP) from the patients with rhegmatogenous retinal detachment (RRD) and the mechanism associated with its development. Methods Twenty specimens of MP surgically removed by vitrectomy from 13 patients were dissected into two layers in each of them.The ultrastructure of two layers,i,e,near the vitreous and near the retina,was studied with electron microscopy. Results Seven sections of the near vitreous ones appeared prodominant collagen deposits and a few of epithelial-like cells,and pigment particles might be present in the cytoplasm.While cells with foot processes were found in 13 membrane sections near the retina and increasing number of various types of cells rich in collagen around were observed including fibroblast-like cells and glial cells. Conclusion The findings suggest that the MP after surgery of retinal detachment may possess a characteristic lamination,and posterior hyaloid cortex was involved in the developmetn of MP.The adhesion between posterior hyaloid cortex and macular area might be a key factor for forming MP.
7.Diagnosis and treatment of colonoscopic perforation
International Journal of Surgery 2010;37(11):750-752
Colonoscopy has become the most commonly used method to the diagnosis and treatment of colorectal diseases at present.Colonoscopic perforation is considered the most serious complication with high mortality, especially in the patients with certain risk factors and iatrogenic factors, despite of its low incidence.According to the clinical features in the period of perioperative colonoscopy, early detection of colonoscopic perforation is a prerequisite for successful treatment and the key to lower mortality.So far in the treatment,some methods can be selected, including conservative treatment, open surgery, laparoscopic surgery and endoscopy folders, etc.Clinical judgement and analysis of disease should be specific and accurate, but not to be generalized.Doctors should adopt reasonable and effective treatment options according to clinical performance, the size of perforation,intestinal readiness, time of diagnosis, colon primary lesion and so on.
8.An analysis of postoperative complications in aged patients receiving pancreaticoduodenectomy
Chinese Journal of Hepatobiliary Surgery 2011;17(1):23-25
Objective To analyze the postoperative complications in aged patients receiving pancreaticoduodenectomy. Methods Pancreaticoduodenectomy was employed for the treatment of 52 aged patients. Of the 52 patients with a mean age of 70.5(65-76), 32 were male and 20 female. Postoperative pathological examination confirmed that 24 patients suffered from Vater,s ampullary and duodenal cancers, 16 from pancreatic carcinoma and 12 from cholangiocarcinoma. Results The mortality was 7.7%. Severe complications included bleeding (upper gastrointestinal tract or abdominal cavity),MOF, ARDS, postsurgical gastroparasis syndrome(PGS), mental disorder, pancreaticogastrostomy leak and biliary-enteric anastomotic leak et al. Conclusion MOF is the main lethal complication. Incidence of PGS and mental disorder is high.
9.Misdiagnosis analysis for 74 cases of acute abdominal pain as the first symptom of non-digestive diseases
Chinese Journal of Primary Medicine and Pharmacy 2010;17(15):2026-2027
Objective To explore the abdominal pain as initial symptom of non-digestive diseases,the causes of misdiagnosis. Methods 74 patients with clear diagnosis non-digestive diseases which initial symptom was acute abdominal pain were analyzed. Results The most common causes of misdiagnosis were blood system diseases,circulatory diseases,metabolic diseases,endocrine system diseases,respiratory diseases,nervous system disease,accounting for 35.1% ,25.7% ,10. 8% ,8. 1% ,6. 8% ,6. 8%.The rest,such as the urinary system diseases,toxic diseases were not rare. Conclusion Non-digestive diseases which initial symptom was acute abdominal pain could be caused by the body's various systems,and the causes were complex,the diseases conditions were critical and changed rapidly,so it was difficult to diagnose and had to be Paid attention on.
10.Treatment options of unstable distal radial fractures in elderly patients
Chinese Journal of Geriatrics 2010;29(7):563-565
Objective To study the advantage and disadvantage of different treatments of unstable distal radial fractures in elderly patients. Methods In the period from August 2005 to January 2010, 55 elderly patients with unstable d istal radial fractures were treated with manual diaplasis and external plaster splint fixation, operation and internal plate fixation, or external fixation. Clinical outcomes were evaluated by Gartland-Werley wrist scoring systems and questionnaire of the disabilities of the Arm, Shoulder and Hand (DASH). We used SPSS13.0 software package for statistical analysis. Results Compared with the manual diaplasis group, the operation and internal plate fixation group or external fixation group was better in Gartland-Werley scores, the differences were statistically significant (P<0.05), but there were no differences in DASH scores among the 3 groups. Conclusions The treatment of unstable distal radial fractures in elderly patients should be chosen based on the characteristics of the fractare and patients desire.