Head and Neck Imaging ( Direct Diagnosis ) by Ulrich Möedder, Mathias Cohnen, Kjel Andersen, Volkher

By Ulrich Möedder, Mathias Cohnen, Kjel Andersen, Volkher Engelbrecht, Benjamin Fritz

Dx-Direct is a sequence of 11 Thieme books protecting the most subspecialties in radiology. It contains the entire instances you're probably to determine on your regular operating day as a radiologist. for every situation or disorder you'll find the data you need—with simply the perfect point of detail.Whether you're a resident or a trainee, getting ready for board examinations or simply searching for a perfectly prepared reference:Dx-Direct is the high-yield selection for you!The sequence covers the total spectrum of radiology subspecialties including:BrainGastrointestinalCardiacBreastUrogenitalVascularSpinalHead and NeckMusculoskeletalPediatricThoracicDx-Direct will get to the point:Definitions, Epidemiology, Etiology, and Imaging symptoms general Presentation, treatments, path and analysis Differential prognosis, suggestions and Pitfalls, and key References ... all mixed with top of the range diagnostic photos.

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Paragangliomas are multiple in 10%of cases. 80% are glomus jugulare or carotid body tumors. Glomus rympanicum tumars: 5:1 preponderance of females over males. Peak occurence at 40-50 years. • Etiology, pathophysiology, pathogenesis Benign tumor. Arises from chemoreceptor cells. - Glamus rympanicum tumor: Tympanic nerve (branch of glossopharyngeal nerve) • Isolated middle ear lesion, begins on cochlear promontory. - Glomus jugu/are tumor: Adventitia of the jugular bulb. Imaging Signs ............................................................................................

Isolated or generalized. unilateral or bilateral extraocular muscle enlargement. Enhancement after con- trast administration due to hypervascular inflammatory process. • MRI findings Isointense on T1-weighted and T2-weighted images. Usually enhances after gadolinium administration. - Localizedfonn: Affects only one orbital structure (eyeball. fat. muscles. or optic nerve). - Diffusefonn: Affects all or multiple structures. • Pathognomonic findings Isodense on T2-weighted images. Diffuse infiltration of the orbit and orbital structures.

Role of magnetic resonance imaging in the assessment of disease activity in thyroid-associated ophthalmopathy. ~ . ~ Epidemiology Most common in children. Peak incidence at 8 years of age. Inflammatory processes account for 60% of all primary orbital diseases. ~ Etiology, pathophysiology, pathogenesis Acute inflammatory intraorbital complication. Subperiosteal pus collection under the lamina papyracea • Secondary to sinusitis (mostly staphylococci. streptococci and Haemophi/us species). Chandler classification: - Stage I: Preseptal cellulitis.

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