It is generally considered that granitic plutons are forcefully emplaced in acompressional setting and permissively emplaced in an extensional setting. This paper, however,shows that syn-kinematic (extensional) ellipt...It is generally considered that granitic plutons are forcefully emplaced in acompressional setting and permissively emplaced in an extensional setting. This paper, however,shows that syn-kinematic (extensional) elliptic granitic plutons in the Yagan-Onch Hayrhanmetamorphic core complex (MCC) have relatively strong forceful emplacement, which are indicated by(1) concentric distribution of the rock units, (2) a strain pattern with strong strains on themargins and low strains at the centre of a pluton, and particularly (3) syn-emplacement shorteningof the host rocks within the aureole. The strain analysis for the host rocks shows that thehost-rock ductile shortening, i.e. forceful emplacement, provides about 16-24 percent of theemplacement space for the present plutons. All these suggest that forceful emplacement occurs notonly in a compressional tectonic setting, but also in an extensional setting. This study furtherdemonstrates the significance of the multiple emplacement of granitic plutons and provides newinformation about the causality between granitic magmatism and the formation of the MCC and itsdynamics.展开更多
AIM:To evaluate the clinicopathologic characteristics of the children with solitary rectal ulcer.METHODS:Fifty-five children with a confirmed diagnosis of solitary rectal ulcer were studied in a period of11 years from...AIM:To evaluate the clinicopathologic characteristics of the children with solitary rectal ulcer.METHODS:Fifty-five children with a confirmed diagnosis of solitary rectal ulcer were studied in a period of11 years from March 2003 to March 2014.All data were collected from the patients,their parents and medical records in the hospital.RESULTS:From 55 studied patients,41 were male(74.5%) and 14 female(25.5%).The mean age of the patients was 10.4 ± 3.7 years and the average time period from the beginning of symptoms to diagnosis of solitary rectal ulcer was 15.5 ± 11.2 mo.The most common clinical symptoms in our patients were rectal bleeding(n=54,98.2%) and straining during defecation or forceful defecation(n = 50,90.9%).Other symptoms were as follows respectively:Sense of incomplete evacuation(n = 34,61.8%),mucorrhea(n=29,52.7%),constipation(n=14,25.4%),tenesmus and cramping(n =10,18.2%),diarrhea(n= 9,16.4%),and rectal pain(n= 5,9.1%).The colonoscopic examination revealed 67.3%ulcer,12.7%polypoid lesions,10.9%erythema,7.3%both polypoid lesions and ulcer,and 1.8%normal.Most of the lesions were in the rectosigmoid area at a distance of 4-6 cm from the anal margin.Finally,69.8%of the patients recovered successfully with conservative,medical and surgical management.CONCLUSION:The study revealed that solitary rectal ulcer is not so uncommon despite what was seen in previous studies.As the most common symptom was rectal bleeding,clinicians and pathologists should be familiar with this disorder and common symptoms in order to prevent its complications with early diagnosis.展开更多
基金the National Natural Science Foundation of China(grant 49872072) the Postdoctoral Foundation of China.
文摘It is generally considered that granitic plutons are forcefully emplaced in acompressional setting and permissively emplaced in an extensional setting. This paper, however,shows that syn-kinematic (extensional) elliptic granitic plutons in the Yagan-Onch Hayrhanmetamorphic core complex (MCC) have relatively strong forceful emplacement, which are indicated by(1) concentric distribution of the rock units, (2) a strain pattern with strong strains on themargins and low strains at the centre of a pluton, and particularly (3) syn-emplacement shorteningof the host rocks within the aureole. The strain analysis for the host rocks shows that thehost-rock ductile shortening, i.e. forceful emplacement, provides about 16-24 percent of theemplacement space for the present plutons. All these suggest that forceful emplacement occurs notonly in a compressional tectonic setting, but also in an extensional setting. This study furtherdemonstrates the significance of the multiple emplacement of granitic plutons and provides newinformation about the causality between granitic magmatism and the formation of the MCC and itsdynamics.
基金financial support was provided by research affairs of Shiraz University of Medical Sciences
文摘AIM:To evaluate the clinicopathologic characteristics of the children with solitary rectal ulcer.METHODS:Fifty-five children with a confirmed diagnosis of solitary rectal ulcer were studied in a period of11 years from March 2003 to March 2014.All data were collected from the patients,their parents and medical records in the hospital.RESULTS:From 55 studied patients,41 were male(74.5%) and 14 female(25.5%).The mean age of the patients was 10.4 ± 3.7 years and the average time period from the beginning of symptoms to diagnosis of solitary rectal ulcer was 15.5 ± 11.2 mo.The most common clinical symptoms in our patients were rectal bleeding(n=54,98.2%) and straining during defecation or forceful defecation(n = 50,90.9%).Other symptoms were as follows respectively:Sense of incomplete evacuation(n = 34,61.8%),mucorrhea(n=29,52.7%),constipation(n=14,25.4%),tenesmus and cramping(n =10,18.2%),diarrhea(n= 9,16.4%),and rectal pain(n= 5,9.1%).The colonoscopic examination revealed 67.3%ulcer,12.7%polypoid lesions,10.9%erythema,7.3%both polypoid lesions and ulcer,and 1.8%normal.Most of the lesions were in the rectosigmoid area at a distance of 4-6 cm from the anal margin.Finally,69.8%of the patients recovered successfully with conservative,medical and surgical management.CONCLUSION:The study revealed that solitary rectal ulcer is not so uncommon despite what was seen in previous studies.As the most common symptom was rectal bleeding,clinicians and pathologists should be familiar with this disorder and common symptoms in order to prevent its complications with early diagnosis.
