The nano-domain, with short-range ordered structure, has been widely observed in rare-earth-doped ceria. Atomistic simulation has been employed to investigate the ordering structure of the nano-domain, as a result of aggregation and segregation of dopant cations and the associated oxygen vacancies in gadolinium-doped ceria. It is found that the binding energy of defect cluster increases as a fu...

Dumbbell-shaped hypoglossal Schwannomas of the 12th cranial nerve are extremely rare, and complete removal of these tumors is difficult, particularly in elderly patients with recurrent tumors. The present study reports the case of a 61-year-old male with a giant recurrent dumbbell-shaped hypoglossal schwannoma that arose extracranially. The recurrent tumor was completely removed in a one-stage ...

A [3]rotaxane 1 involving two naphtho-21-crown-7 (N21C7) rings and a dumbbell-shaped component 4 was synthesized. The dumbbell-shape molecule 4 contains one viologen nucleus, two secondary alkyl ammonium sites and two phenyl stoppers. After threading the N21C7 ring with the thread-like ammonium guest 3, the copper(I)-catalyzed Huisgen alkyne-azide 1,3-dipolar cycloaddition (CuAAC ‘‘click’’ reac...

ABSTRACT Spinal neurofibromas occur sporadically and typically occur in association with neurofibromatosis 1. Patients afflicted with neurofibromatosis 1 usually present with involvement of several nerve roots. This report describes the case of a 14- year-old child with a large intraspinal, but extradural tumour with paraspinal extension, dumbbell neurofibroma of the cervical region extending f...

Objective: To observe the therapeutic effect of microsurgery through hemilaminectomy approach on extramedullary spinal tumor. Methods: Hemilaminectomy was performed on 45 patients with extramedullary spinal tumor. Of the 45 patients, 35 had intradural extramedullary spinal tumors and 10 dumbbell-shaped spinal tumors. Spinal schwannoma occurred in 36 patients and spinal meningioma in 9 patients....

A 53 year-old male presented with a one-day history of a swollen arm and dull, aching pain in the right upper extremity. The patient reported commencing exercising daily over the prior week with a modified, oscillating dumbbell; commonly referred to as a Shake Weight. Imaging revealed an occlusive thrombus in the right axillary, proximal brachial and basilic veins. The patient was treated with ...

✔ Spinal neurofibromas are the most prevalent group of spinal tumors. They occur sporadically or in association with Neurofibromatosis type-1 (NF1, von Recklinghausen disease). A neurofibroma’s developing a “dumbbell tumor” is a situation which is quite often seen. Surgical intervention is indicated when myelopathy and motor deficits develop in the case of paraspinal neurofibromas. The goal of ...