BACKGROUND Ligamentoid fibromatosis is a rare borderline tumor that occurs in the muscles,fascia,and aponeurosis.It is a kind of soft tissue tumor of fibrous origin,also known as invasive fibromatosis,desmoid fibroma,...BACKGROUND Ligamentoid fibromatosis is a rare borderline tumor that occurs in the muscles,fascia,and aponeurosis.It is a kind of soft tissue tumor of fibrous origin,also known as invasive fibromatosis,desmoid fibroma,neurofibromatosis,etc.The tumor is between benign and malignant tumors and rarely has distant metastasis.Its characteristics are mainly local invasion,destruction and growth and easy recurrence.The World Health Organization defines it as a fibroblast cloning value-added lesion originating from deep soft tissue,which causes local invasion and growth leading to tissue reconstruction,extrusion and destruction of important structures and organs.The incidence rate accounts for 0.03%of all tumors and less than 3%of all soft tissue tumors.Definite diagnosis mainly depends on postoperative pathology.Surgical resection is still the main way to treat the disease,and a variety of nonsurgical treatment methods are auxiliary.Combined treatment can effectively reduce the risk of postoperative recurrence.CASE SUMMARY The patient is a 57-year-old female.One week ago,she accidentally found a mass in the left upper abdomen while lying flat.There was no abdominal pain and abdominal distention,no fever,no black stool and blood in the stool and no nausea and vomiting.She had a 10-year history of glaucoma on the left side,underwent hysterectomy for uterine fibroids 5 years ago,had no hypertension,heart disease,diabetes,hepatitis or tuberculosis,had no history of smoking and had been drinking for 20 years.CONCLUSION Accurate preoperative diagnosis is difficult,surgical resection is the main treatment,and a variety of nonsurgical treatment methods are auxiliary.Combined treatment can effectively reduce the risk of postoperative recurrence.The prognosis is still good,and the risk of recurrence of secondary surgery is greatly increased.展开更多
The elastic modulus of asphalt concrete(AC) is an important material parameter for pavement design.The prediction and determination of elastic modulus,however,largely depends on laboratory tests which cannot reflect e...The elastic modulus of asphalt concrete(AC) is an important material parameter for pavement design.The prediction and determination of elastic modulus,however,largely depends on laboratory tests which cannot reflect explicitly the influence of the microstructure of AC.To this end,a micromechanical model based on stepping scheme is adopted.Consideration is given to the influence of interfacial debonding and interlocking effect between the aggregates and asphalt mastic using the concept of effective bonding.Tests on asphalt mixture with various microstructures are conducted to verify the proposed approach.It is shown that the prediction is generally in agreement with experimental results.Parameters affecting the elastic modulus of AC are also discussed in light of the proposed method.展开更多
文摘BACKGROUND Ligamentoid fibromatosis is a rare borderline tumor that occurs in the muscles,fascia,and aponeurosis.It is a kind of soft tissue tumor of fibrous origin,also known as invasive fibromatosis,desmoid fibroma,neurofibromatosis,etc.The tumor is between benign and malignant tumors and rarely has distant metastasis.Its characteristics are mainly local invasion,destruction and growth and easy recurrence.The World Health Organization defines it as a fibroblast cloning value-added lesion originating from deep soft tissue,which causes local invasion and growth leading to tissue reconstruction,extrusion and destruction of important structures and organs.The incidence rate accounts for 0.03%of all tumors and less than 3%of all soft tissue tumors.Definite diagnosis mainly depends on postoperative pathology.Surgical resection is still the main way to treat the disease,and a variety of nonsurgical treatment methods are auxiliary.Combined treatment can effectively reduce the risk of postoperative recurrence.CASE SUMMARY The patient is a 57-year-old female.One week ago,she accidentally found a mass in the left upper abdomen while lying flat.There was no abdominal pain and abdominal distention,no fever,no black stool and blood in the stool and no nausea and vomiting.She had a 10-year history of glaucoma on the left side,underwent hysterectomy for uterine fibroids 5 years ago,had no hypertension,heart disease,diabetes,hepatitis or tuberculosis,had no history of smoking and had been drinking for 20 years.CONCLUSION Accurate preoperative diagnosis is difficult,surgical resection is the main treatment,and a variety of nonsurgical treatment methods are auxiliary.Combined treatment can effectively reduce the risk of postoperative recurrence.The prognosis is still good,and the risk of recurrence of secondary surgery is greatly increased.
基金supported by the National Natural Science Foundation of China (Nos. 10725210 and 50808159)the National Basic Re-search Program (973) of China (No. 2009CB623204)
文摘The elastic modulus of asphalt concrete(AC) is an important material parameter for pavement design.The prediction and determination of elastic modulus,however,largely depends on laboratory tests which cannot reflect explicitly the influence of the microstructure of AC.To this end,a micromechanical model based on stepping scheme is adopted.Consideration is given to the influence of interfacial debonding and interlocking effect between the aggregates and asphalt mastic using the concept of effective bonding.Tests on asphalt mixture with various microstructures are conducted to verify the proposed approach.It is shown that the prediction is generally in agreement with experimental results.Parameters affecting the elastic modulus of AC are also discussed in light of the proposed method.
