Pulmonary inflammatory Myofibroblastic tumor indistinguishable from tuberculosis: a case report in a five-year-old child with hemoptysis

Abstract Background Pulmonary inflammatory myofibroblastic tumor (PIMT) is a rare disease in China and its incidence is much lower than that of tuberculosis. PIMT accounts for only 0.04–1.2% of all lung tumors. PIMT can occurs in any age and nearly every part of the body. The clinical symptoms and radiological features of PIMT are nonspecific. Diagnosis is only made on the basis of histopathologic or immunohistochemical evaluation of the postoperation resected tissue. The therapeutic approach to PIMT should rely mainly on complete surgical resection. Case presentation We report a case of PIMT with hemoptysis. The girl was misdiagnosed with tuberculosis and treated with anti-tuberculous drugs for a long period of time. A right upper and middle lobectomy was performed and further assessment of the tissue demonstrated a pathologic diagnosis of PIMT. Conclusions Despite a high incidence of tuberculosis, we must consider the possibility of PIMTs in such cases to prevent misdiagnosis and mistreatment

Crystal plasticity finite element modelling of the effect of friction on surface asperity flattening in cold uniaxial planar compression

During uniaxial planar compression of annealed aluminium alloys, a novel approach to determine the surface asperity flattening (roughness R-a) is employed by analyzing the evolution of the surface\u27s microtexture. With an increase in compression strain, the surface asperity tends to be flattened, and strain hardening increases. Lubrication can constrain the surface asperity flattening process and hinder the progress of grain surface flattening. The development of surface texture shows an obvious dependency: under the influence of friction, the normal deformation texture component (brass orientation {0 1 1} \u3c 1 1 2 \u3e can be generated easily, while lubrication can hinder this texture component generation. Simulated results show a good agreement with experimental results which predicated brass orientation. However, due to the limitation of the FCC Taylor model, the other orientation components cannot be predicted

Analysis of surface asperity flattening based on two different methods

The stress state is an important parameter in metal forming processes, which significantly influences the strain state and microstructure of products, affecting their surface qualities. In order to make the metal products have a good surface quality, the surface stress state must be optimised. In this study, two classical methods, the upper bound method and the crystal plasticity finite element method, were investigated. The differences between the two methods were discussed in regard to the model, the velocity field, and the strain field. Then the related surface roughness is deduced