INTRODUCTION Mediastinal dumbbell tumors are rare, and special cases provide valuable knowledge to the existing literature. PRESENTATION OF CASE A 57-year-old woman was diagnosed with a recurrent dumbbell-shaped nerve sheath tumor with intrathoracic and intraspinal components. We attempted to resect the tumor via combined biport thoracoscopy and laminectomy with the patient in a prone positio...

We construct the edge-localized stationary states of nonlinear Schrödinger equation on a general quantum graph in limit large mass. Compared to previous works, we include arbitrary multi-pulse positive which approach asymptotically composition N solitons, each sitting bounded (pendant, looping, or internal) edge. give sufficient conditions edge lengths under such exist In addition, compute prec...

Background: Ganglioneuroma is a rare benign tumor, which is usually located in the posterior mediastinum and retroperitoneum. Occasionally, it involves the paraspinal region with intraspinal extension and becomes dumbbell shaped. Dumbbell ganglioneuromas rarely affect the lumbar spine, and only nine cases of dumbbell lumbar ganglioneuromas have been reported previously. Case presentation: We ar...

Genetic therapy holds great promise for the treatment of inherited or acquired genetic diseases; however, its breakthrough is hampered by the lack of suitable gene delivery systems. Dumbbell-shaped DNA minimal vectors represent an attractive, safe alternative to the commonly used viral vectors which are fraught with risk, but dumbbell generation appears to be costly and time-consuming. We devel...

Dumbbell growth is often observed in schwannoma but rarely in meningioma. In particular, the occurrence of dumbbell meningioma at the cervical cord level in Japan is markedly rare. We reported an elderly case with symptomatic meningioma that developed in a dumbbell shape from cervical spine and was treated successfully by surgery.

Dumbbell-type proteins have two domains linked by a long helical segment. Typical examples of dumbbell-type proteins are calmodulin and troponin C, which have regulating function of other proteins [1, 2]. The function seems to be closely related to the dumbbell shape of this protein. Upon binding of calcium, calmodulin changes its structure and strongly interacts with other protein, modulating ...

The occurrence of both dumbbell meningioma and dumbbell schwannoma in one patient has not been reported in the literature. We present a 16-year-old female patient, who had progressive bilateral hearing impairment for 5 years and a progressively enlarged, non-tender neck mass for 1.5 years. Mild motor weakness over her right upper limb was noted 1 week before admission. No café-au-lait spot was ...

A dumbbell-shaped rigid body can be used to represent certain large spacecraft or asteroids with bimodal mass distributions. Such a dumbbell body is modeled as two identical mass particles connected by a rigid, massless link. Equations of motion for the five degrees of freedom of the dumbbell body in a central gravitational field are obtained. The equations of motion characterize three orbit de...

Although several cases of a dumbbell tumor of thoracic nerve roots have been reported, reports on the surgical procedures for a dumbbell tumor of the first thoracic (T1) nerve root are rare. Surgeons should be cautious, especially when performing a surgical procedure for a dumbbell tumor of the T1 nerve root because the tumor is anatomically located adjacent to important organs and because the ...