OUVIDO EXT. - TU BENG E MALIG Flashcards
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OSTEOMA CAE
Coronal bone CT in the same patient shows the osteoma –> almost completely plugging the EAC lumen. There is still sufficient room for wax and squamous debris to exit the medial EAC.
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EXOSTOSE CAE
Coronal temporal bone CT in the same patient shows EAC exostoses --\> with moderate EAC luminal stenosis =\>. The bilaterality (not shown) and circumferential bony involvement differentiate this lesion from unilateral, focal EAC osteoma.
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EXOSTOSE CAE
Axial bone CT reveals bilateral EAC exostoses –> with moderate EAC luminal stenosis =>
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EXOSTOSE CAE
“SURFISTA”
Coronal graphic shows benign-appearing bony overgrowth of the right EAC –> in a case of EAC exostoses. Insert shows otoscopic view of circumferential submucosal EAC narrowing => .
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CARCINOMA DE CELS ESCAMOSAS DA PELE
Axial T1WI C+ FS MR shows more advanced EAC SCCa with gross transdural => extension into left middle cranial fossa. Marked thickening and enhancement along CNVII at the geniculate ganglion **> and in the internal auditory canal –> represents a perineural tumor.
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OSTEOMA CAE
Clinical exam shows occlusion of the EAC. Axial bone CT shows a pedunculated osteoma –> arising from the anterior EAC bony wall => . Note the secondary cholesteatoma ~> within the medial EAC.
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EXOSTOSE CAE
Axial bone CT through the EACs demonstrates bilateral circumferential EAC exostoses –> in this middle-aged man with a lifelong passion for surfing.
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CARCINOMA DE CELS BASAIS CAE
Clinical photograph shows a large, ulcerative BCCa involving the forehead, medial canthus, and nose in a patient presenting with left vision loss. Large ulcer –> is evident, but note the heaped-up, thick margins, indicating an infiltrating tumor.
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CARCINOMA DE CELS BASAIS CAE
Axial CECT in a patient presenting with history of large, slow-growing, ulcerated mass behind the left external auditory canal reveals an irregular, heterogeneously enhancing postauricular mass –> . Tumor abuts and invades the left mastoid
bone ~> and extends through to dura of posterior fossa => .
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EXOSTOSE CAE
Coronal bone CT of the right temporal bone shows severe EAC stenosis => secondary to circumferential exostoses –> that developed bilaterally as a result of chronic cold water exposure from surfing.
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CARCINOMA DE CELS BASAIS CAE
Axial T2WI MR in the same patient demonstrates predominantly infiltrative lesion –> mildly hyperintense as compared to muscle. Tumor erodes the thickness of facial soft tissues, including muscles and right parotid gland.
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CARCINOMA DE CELS ESCAMOSAS DA PELE
Axial CT of temporal bone reveals a SCCa of right EAC with prominent soft tissue mass –> filling the EAC. Osseous invasion through the posterior wall of TMJ condylar fossa => is present. Distal EAC at TM **> is clear of tumor.
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OSTEOMA CAE
Axial left ear temporal bone (T-bone) CT demonstrates a small, focal benign-appearing osseous pedunculated mass within the anterior left EAC –>, consistent with an incidental EAC osteoma.
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OSTEOMA CAE
Axial right ear T-bone CT demonstrates a small osseous lesion –> within the right anterolateral EAC without surrounding aggressive features, consistent with an EAC osteoma.
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CARCINOMA DE CELS ESCAMOSAS DA PELE
Coronal graphic illustrates large EAC squamous cell carcinoma (SCCa) presenting as a mass –> filling canal. Note the aggressive features with infiltration of the auricle and its cartilages ~> , invasion of temporal bone => , and metastatic intraparotid node **> .
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CARCINOMA DE CELS BASAIS CAE
Axial bone CT in the same patient shows extensive abnormality of squamous and petrous temporal bone with both permeative change –> and gross destruction ~>. Middle ear is opacified with tumor, which is also partially eroding and displacing ossicles =>.
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OSTEOMA CAE
Patient presents with hard submucosal mass in midexternal auditory canal. Axial bone CT shows an osteoma –> pedunculating from the anterolateral aspect => of the bony external auditory canal (EAC).
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CARCINOMA DE CELS ESCAMOSAS DA PELE
Axial T1WI C+ MR shows a solidly enhancing EAC SCC –> filling the canal and invading anteriorly into the TMJ. Note the soft tissue tumor around the right condylar head => .
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CARCINOMA DE CELS ESCAMOSAS DA PELE
Coronal CT bone algorithm of the right temporal bone demonstrates soft tissue filling the the EAC –> with inferior osseous destruction => without bony flecks, consistent with EAC SCCa.
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CARCINOMA DE CELS BASAIS CAE
Axial T1WI C+ FS MR demonstrates thin enhancement of a tumor at the ulcer margins –>, around the left globe, and invading anterior ethmoid air cells ~>. Note left retinal detachment =>. There was no evidence of perineural tumor along the trigeminal or facial nerves.
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CARCINOMA DE CELS BASAIS CAE
Clinical photograph shows patient who had been lost to follow-up for 8 years following excision of right ear basal cell carcinoma (BCCa). Large ulcerative
lesion –> completely erodes right auricle and extends into cheek, exposing underlying temporal bone.
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CARCINOMA DE CELS BASAIS CAE
Axial T1WI C+ FS MR in the same patient reveals intense but heterogeneous tumor enhancement –>. Extension to dura is evident with involvement of the
sigmoid sinus ~>.
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CARCINOMA DE CELS BASAIS CAE
Axial T1WI C+ MR at a slightly higher level reveals only mild enhancement of infiltrating margins of tumor –> as temporal bone and facial tissues are eroded. Note dural enhancement and thickening ~> , indicating intracranial extension.
