15-dr ahmed esawy imaging oral board of sinus ,ear,fascial nerve ,mastiod imaging
TRANSCRIPT
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The Art of Radiology
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choanal atrsia , failed resorbtion of the naso-oral septum
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frontal mucocele , low T1,T2 high , and no air because of ostial obstruction, demonstrates peripheral
enhancementbilateral frontal mucocele
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inverted papilloma , diffuse enhancement and bone destructive
behavior
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mucocele ethmoidal
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nasal dermoid
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sinus carcinoma
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SINUS ANTROCHOANAL POLYP
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sinus carcinoma
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sinus encephalocel and mucocele
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Fungal sinusitis
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sinus fungal
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sinus fungal , black areas T1,T2 correponds to fungi
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sinus fungal infection compare to CT to differentiate from air
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sinus inverted papilloma , homogenous post contrast
enhancement
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sinus keratocyst , the cyst dissect aroud the tooth
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sinus lymphoma
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sinus metastasis
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Cholesteral granuloma
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Cholesterol granuloma
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Sialolithiasis
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Sialolithiasis
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Normal coronal CT
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Cholesteatoma
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Cholesteatoma
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Congenital and Acquired Hearing Loss
MRI Findings
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NORMAL ANATOMY
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NORMAL ANATOMY
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NORMAL ANATOMY
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COCHLEAR DYSPLASIA WITH ABSENT SEMICIRCULAR CANALS
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Mild Enlargement of Vestibular Aqueduct and Cochlear Dysplasia
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LARGE ENDOLYMPHATIC SAC
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MARKEDLY ENLARGED ENDOLYMPHATIC SACS
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LARGE VESTIBULAR AQUEDUCTS
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FIBROSING LABYRINTHITIS
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FIBROSING LABYRINITHITIS
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LABYRINITHITIS OSSIFICANS
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LABYRINITHITIS OSSIFICANS
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COCHLEAR OTOSPONGIOSIS
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CRANIAL NERVE VIII SCHWANNOMA
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3 Brain Stem Nuclei:
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Facial nerve segments:
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Anatomy Review
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Course of the Facial nerve
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Facial nerve hemangioma
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Imaging in Atypical Bell’s Palsy
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Tuberculosis
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Parotid & peri-parotid disease
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HIV Infection
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Bezold’s abscess & coalescent mastoiditis
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Facial neuritis.
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Trauma
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Venous angioma: pontine
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Fascial nerve Neoplasms
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Hemangioma
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Hemangioma
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Facial Nerve Schwannoma
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Facial schwannoma
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Glomus Tumor
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Other tumors
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Vestibular Schwannoma
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Meningioma
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Rhabdomyosarcoma
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CONCLUSION
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Normal anatomy
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vestibular schwannoma (arrow)
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Imaging in Acute Facial Nerve Paralysis
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Imaging in Typical Bell’s Palsy
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Imaging in Atypical Bell’s Palsy
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Alternative Causes of Acute Facial Nerve Paralysis
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Tuberculosis
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Parotid & peri-parotid disease
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HIV Infection
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Bezold’s abscess & coalescent mastoiditis
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Neoplasms
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Hemangioma
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Hemangioma
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Facial Nerve Schwannoma
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Perineural Tumor Spread
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Glomus Tumor
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Other tumors
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Vestibular Schwannoma
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Vestibular Schwannoma
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Meningioma
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Rhabdomyosarcoma
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Miscellaneous Causes
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Hypertrophic Polyneuropathy
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Wegener’s Granulomatosis
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Other Causes
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Melkersson-Rosenthal Syndrome
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Types of mastoid aereations
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squamo-mastoid type
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HRCT image showing pneumatization of temporal bone
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LOOK FOR
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Normal mastiod
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There are 5 factors arranging middle ear pressure:
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Role of X-ray in mastioditis
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X-rays of the mastoiditis
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DD for cavity
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Differentiate operating cavity from cholesteatoma
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Histiocytosis (arrow) of right temporal bone
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CT scanning
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CT acute mastoiditis
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CT mastoid abscess
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Complications in acute mastoiditis
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Acute incipient mastoiditis
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Acute incipient mastoiditis
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Acute coalescent mastoiditis
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Acute coalescent mastoiditis
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Acute mastoiditis
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Infectious Causes of Torticollis: Mastoiditis/Bezold’s Abscess
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Bezold’s Abscess
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PLAIN X-RAY EXAMINATION
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Mastoiditis
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Mastoiditis
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Mastoiditis complication