15-dr ahmed esawy imaging oral board of sinus ,ear,fascial nerve ,mastiod imaging

The Art of Radiology

choanal atrsia , failed resorbtion of the naso-oral septum

frontal mucocele , low T1,T2 high , and no air because of ostial obstruction, demonstrates peripheral

enhancementbilateral frontal mucocele

inverted papilloma , diffuse enhancement and bone destructive

behavior

mucocele ethmoidal

nasal dermoid

sinus carcinoma

SINUS ANTROCHOANAL POLYP

sinus carcinoma

sinus encephalocel and mucocele

Fungal sinusitis

sinus fungal

sinus fungal , black areas T1,T2 correponds to fungi

sinus fungal infection compare to CT to differentiate from air

sinus inverted papilloma , homogenous post contrast

enhancement

sinus keratocyst , the cyst dissect aroud the tooth

sinus lymphoma

sinus metastasis

Cholesteral granuloma

Cholesterol granuloma

Sialolithiasis

Sialolithiasis

Normal coronal CT

Cholesteatoma

Cholesteatoma

Congenital and Acquired Hearing Loss

MRI Findings

NORMAL ANATOMY

NORMAL ANATOMY

NORMAL ANATOMY

COCHLEAR DYSPLASIA WITH ABSENT SEMICIRCULAR CANALS

Mild Enlargement of Vestibular Aqueduct and Cochlear Dysplasia

LARGE ENDOLYMPHATIC SAC

MARKEDLY ENLARGED ENDOLYMPHATIC SACS

LARGE VESTIBULAR AQUEDUCTS

FIBROSING LABYRINTHITIS

FIBROSING LABYRINITHITIS

LABYRINITHITIS OSSIFICANS

LABYRINITHITIS OSSIFICANS

COCHLEAR OTOSPONGIOSIS

CRANIAL NERVE VIII SCHWANNOMA

3 Brain Stem Nuclei:

Facial nerve segments:

Anatomy Review

Course of the Facial nerve

Facial nerve hemangioma

Imaging in Atypical Bell’s Palsy

Tuberculosis

Parotid & peri-parotid disease

HIV Infection

Bezold’s abscess & coalescent mastoiditis

Facial neuritis.

Trauma

Venous angioma: pontine

Fascial nerve Neoplasms

Hemangioma

Hemangioma

Facial Nerve Schwannoma

Facial schwannoma

Glomus Tumor

Other tumors

Vestibular Schwannoma

Meningioma

Rhabdomyosarcoma

CONCLUSION

Normal anatomy

vestibular schwannoma (arrow)

Imaging in Acute Facial Nerve Paralysis

Imaging in Typical Bell’s Palsy

Imaging in Atypical Bell’s Palsy

Alternative Causes of Acute Facial Nerve Paralysis

Tuberculosis

Parotid & peri-parotid disease

HIV Infection

Bezold’s abscess & coalescent mastoiditis

Neoplasms

Hemangioma

Hemangioma

Facial Nerve Schwannoma

Perineural Tumor Spread

Glomus Tumor

Other tumors

Vestibular Schwannoma

Vestibular Schwannoma

Meningioma

Rhabdomyosarcoma

Miscellaneous Causes

Hypertrophic Polyneuropathy

Wegener’s Granulomatosis

Other Causes

Melkersson-Rosenthal Syndrome

Types of mastoid aereations

squamo-mastoid type

HRCT image showing pneumatization of temporal bone

LOOK FOR

Normal mastiod

There are 5 factors arranging middle ear pressure:

Role of X-ray in mastioditis

X-rays of the mastoiditis

DD for cavity

Differentiate operating cavity from cholesteatoma

Histiocytosis (arrow) of right temporal bone

CT scanning

CT acute mastoiditis

CT mastoid abscess

Complications in acute mastoiditis

Acute incipient mastoiditis

Acute incipient mastoiditis

Acute coalescent mastoiditis

Acute coalescent mastoiditis

Acute mastoiditis

Infectious Causes of Torticollis: Mastoiditis/Bezold’s Abscess

Bezold’s Abscess

PLAIN X-RAY EXAMINATION

Mastoiditis

Mastoiditis

Mastoiditis complication