Neupsy Key

Introduction Spinal cord ependymomas are the most common intramedullary tumor in adults and the second most common tumor in children after astrocytomas. Ependymomas typically present within the fourth decade of…

Introduction Esthesioneuroblastoma (olfactory neuroblastoma) is an uncommon malignancy of the nasal cavity. Esthesioneuroblastoma represents 3% to 6% of sinonasal malignancies and has an estimated incidence of 0.4 cases per 1…

Introduction Paragangliomas of the head and neck are rare neoplasms of neural crest cell origin. The four most common sites for paragangliomas within the head and neck are at the…

Introduction Paget’s disease, or osteitis deformans, is a chronic metabolic disorder characterized by increased bone turnover and breakdown secondary to excessive and disorganized osteoclastic and osteoblastic activity ( Fig. 48.1…

Introduction Otospongiosis, also known as otosclerosis, is a progressive primary bone disorder of abnormal bone resorption and deposition. The majority of cases result in a progressive conductive hearing loss with…

Introduction Background IgG4-related disease (IgG4-RD) is a relatively recently recognized fibroinflammatory condition of unknown etiology characterized by elevated serum IgG4, plasmacytic infiltration, multifocal tumefactive fibrosis, and clinical improvement by steroid…

Introduction Injection laryngoplasty is performed for treatment of vocal cord paralysis, which may have a variety of causes ( Box 46.1 ). Imaging during a Valsalva maneuver demonstrates the mechanical…

Introduction Weakening and eventual rupture of the carotid artery is one of the most devastating complications of advanced head and neck cancer treatment. The clinical signs and symptoms related to…

Introduction There are various forms of orbital infection, including those listed in the Jain-Rubin classification: 1. Periorbital cellulitis 2. Orbital cellulitis with or without intracranial complications 3. Orbital abscess with…

Introduction Sjögren syndrome (SS) is a chronic autoimmune disorder characterized by inflammatory destruction of the body’s exocrine glands and may be considered primary or secondary, in association with other autoimmune…