37-year-old man with rapidly growing right-sided periauricular mass.

Slides:

Advertisements

Similar presentations

Axial T1-weighted image after contrast administration (A) and a FLAIR image (B) demonstrating a left parietal subcortical DVA with deep venous drainage.

Advertisements

Case 1. Case 1. Images in a 51-year-old man with a history of painful maxillary swelling caused by GCG.A, Contrast-enhanced axial CT image demonstrates.

A 21-year-old man with recurrent left S1 sciatica and radiculopathy by electromyography. A 21-year-old man with recurrent left S1 sciatica and radiculopathy.

A 50-year-old man with MD. Axial thin-section CT image shows decreased distance between the vertical limb of the posterior semicircular canal and the posterior.

Ossification in nonfungal sinusitis.

Glomus jugulotympanicum in 45-year-old woman who presented with left-sided pulsatile tinnitus. Glomus jugulotympanicum in 45-year-old woman who presented.

Images from the case of a 34-year-old woman who was admitted to the hospital with slight back pain and occasional difficulty swallowing. Images from the.

Two patients with chordoma involving the sphenoid bone.

Patient 4. Patient 4. A 39-year-old woman had a solid nonfunctioning pituitary adenoma without cyst or hematoma. She had no past or present headache. A,

Intraosseous temporal bone meningioma in a 45-year-old woman who presented with left-sided hearing loss and tinnitus. Intraosseous temporal bone meningioma.

VW-MR imaging to differentiate among causes of intracranial arterial stenosis when angiography findings are inconclusive. VW-MR imaging to differentiate.

Patient 1. Patient 1. A, An axial T1-weighted postcontrast image with fat saturation (600/13/2 [TR/TE/excitations]) demonstrates asymmetrical enhancement.

Images from the case of a 34-year-old woman with an enlarging mass on the right side of her neck. Images from the case of a 34-year-old woman with an enlarging.

Case 2. Case 2. Organized hematoma arising from antrochoanal polyp in a 12-year-old girl. A, Contrast-enhanced axial CT scan shows marked irregular nodular.

CT and MR images of patients with inverted papilloma of the maxillary sinus.A, Axial CT image of a patient with inverted papilloma shows cone-shaped focal.

False-positive findings at the base of the left pterygoid process on conventional CT images alone in a 63-year-old woman with nasopharyngeal carcinoma.

Case 1, extranodal orbital involvement in Rosai-Dorfman disease.

Types I and II LTS. Axial contrast-enhanced T1-weighted MR image obtained in a 55-year-old man with a type I LTS on the left and a type II LTS on the right.

Case 5. Case 5. Organized hematoma of the maxillary sinus in a 50-year-old man. A, Precontrast axial CT scan with bone algorithm shows a large, expansile.

Contrast-enhanced fat-suppressed T1-weighted MR images obtained through the orbits show diffuse homogeneous thickening of the medial, lateral, and inferior.

Case 1. Case 1. A, Unenhanced axial CT scan through the nasopharyngeal region shows thickening of the nasopharyngeal tissues at the level of the left torus.

A, Soft-tissue window axial contrast-enhanced CT through thyroid cartilage shows expansile lesion from left alar of thyroid cartilage. A, Soft-tissue window.

A and B, There is asymmetric thickening, T2 hyperintensity, and contrast enhancement of the right BPL compared with that of the left side, better seen.

Case 3. Case 3. A–C, Axial contrast-enhanced CT scans show an enhancing soft-tissue mass (arrows, A) lying against the enlarged and enhancing right submandibular.

Axial view MR images of the head, obtained at the time of second presentation.A, T1-weighted MR image (400/15) shows thickening of the dura overlying the.

MR images obtained through the pituitary gland show diffuse enlargement of the pituitary gland. MR images obtained through the pituitary gland show diffuse.

Case 10. Case 10. Organized hematoma of the maxillary sinus in a 76-year-old woman. A, Precontrast axial CT scan with bone window setting shows a large,

A 13-year-old girl with fibrous dysplasia affecting the sphenoid bone.

Identifying IPH on CE-MRA mask images in a 72-year-old man with a right cerebral ischemic event. Identifying IPH on CE-MRA mask images in a 72-year-old.

EACC with intramural bone fragments.

Coronal (A) and axial (B) contrast-enhanced T1-weighted MR images and an axial DWI (C) and ADC map (D) in a patient with primary dural B-cell lymphoma.

Coronal T1-weighted postcontrast MR image in a 42-year-old woman with enhancing polyps in the left lateral wall of the nasopharynx and sphenoid sinus and.

Images reveal arachnoid granulations in a 54-year-old man with headaches who had normal results of an MR imaging study.A, Sagittal reconstruction image.

Coronal T1-weighted postcontrast MR image in a 71-year-old man, 11 years after radiation therapy, with a contrast enhancing polyp (arrow) with less enhancing.

Fig 1. Unenhanced axial T1-weighted MR image (728/15/2 [TR/TE/excitations]; matrix, 256 × 512; section thickness, 4 mm) shows an abnormally thickened second.

A 19-year-old woman with aneurysmal bone cyst.

Orbital cellulitis related to mucormycosis (A–C) and bacterial infection (D–F). Orbital cellulitis related to mucormycosis (A–C) and bacterial infection.

A, Contrast-enhanced axial CT scan shows lipomatous regions with thick septa (white arrow), a low-attenuation high-water-content component (black arrow),

Off-midline non-contrast-enhanced sagittal T1-weighted MR image (500/11/1 [TR/TE/excitations]) in a 25-year-old healthy man shows the normal appearance.

Images from the case of a 6-year-old African-American female patient who presented with a 2-week history of progressive painless swelling of the left cheek.

A, The axial HRCT image of the right temporal bone in case 1 shows an erosion in the posterior temporal bone wall (arrow). A, The axial HRCT image of the.

Contrast-agent–enhanced T1-weighted MR images (700/15) obtained in a 71-year-old man with skin cancer, who had TMJ tenderness and discomfort in the left.

A 47-year-old woman with a history of alcohol abuse presented with ataxia, changes in consciousness, and ocular abnormalities. A 47-year-old woman with.

A 16-year-old boy with juvenile angiofibroma.

A 67-year-old man with intraorbital, infraorbital nerve, and frontal nerve lesions. A 67-year-old man with intraorbital, infraorbital nerve, and frontal.

False-negative findings for skull base invasion by conventional CT images alone in a 74-year-old woman with nasopharyngeal carcinoma. False-negative findings.

Case 5: 39-year-old woman with hearing loss.

Two autopsy cases.A, Axial FLAIR (10,000/156/1) image obtained in a 63-year-old man shows grade 1 signal intensity abnormality in the anterior subependymal.

Case 2: 38-year-old man with right shoulder pain.

Images of a 52-year-old man who developed acute left hemiparesis, ataxia, and agitation (case 1). Images of a 52-year-old man who developed acute left.

Axial CT scan shows decalcification of sphenoid bone (arrowheads) adjacent to neurofibroma infiltration of the lateral rectus muscle (arrows) in the absence.

The classic CT and MR imaging appearance of an astroblastoma in a 5-year-old female patient (patient 4).A, Axial non-contrast-enhanced CT scan shows the.

Neurothekeoma of tongue in a 15-year-old girl.

Case 1. Case 1. A 6-year-old girl with an ill-defined lesion of the left pyriform sinus.A, Contrast-enhanced axial CT scan shows a moderately enhancing.

A, T1-weighted axial MR image shows a large metastasis (asterisk) involving the C2 vertebral body and extending into the surrounding soft tissues. A, T1-weighted.

A 55-year-old woman presented with headache and vomiting with left lateral ventricular mass.A, Axial nonenhanced CT image of the brain at the level of.

A 69-year-old man with small-cell carcinoma from the lung

A, Axial T1- weighted MR image shows a predominantly isointense lesion in the right parietal bone. A, Axial T1- weighted MR image shows a predominantly.

A, T2-weighted coronal image shows a soft-tissue mass of intermediate signal intensity in the left posterior nasal cavity.B, Postcontrast T1-weighted axial.

A, Sagittal T1-weighted, contrast-enhanced, fat-suppressed MR image shows infiltration of the superior extraconal space (small asterisk), superior rectus.

Clinical correlation of uncinate fasciculus involvement on cross-sectional MR imaging.A, Nonenhanced parasagittal T1-weighted image in a 36-year-old woman.

58 year-old man referred for SNHL and vertigo 2 days after stapedectomy with a reparative intravestibular granuloma, confirmed by surgery. 58 year-old.

Metastatic adenocarcinoma.

A 16-year-old boy with rhabdomyosarcoma.

Axial (A)and coronal (B) CT images demonstrate a hyperattenuated mass eroding the roof of the glenoid fossa, abutting the Eustachian tube, and remodeling.

False-positive findings at the base of the left pterygoid process on conventional CT images alone in a 63-year-old woman with nasopharyngeal carcinoma.

Cavernoma/telangiectasia.

A, Contrast-enhanced axial CT scan at the level of the thyroid gland shows a small air pocket within the left lobe of the thyroid gland (black arrow),

Case 2. Case 2. A, Coronal unenhanced T1-weighted image through the base of the skull. The left pterygopalatine fossa appears infiltrated by soft tissue.

LEC of the right parotid gland in a 38-year-old man with painless masses in the right parotid regions for approximately 3 years. LEC of the right parotid.

Presentation transcript:

37-year-old man with rapidly growing right-sided periauricular mass. 37-year-old man with rapidly growing right-sided periauricular mass. A, Axial CT scan of the skull base shows a large heterogeneous mass in the region of the right TMJ. The tumor has extended into the right infratemporal fossa and bowed the posterior wall of the maxillary sinus anteriorly. Multiple areas of low attenuation are seen, which could represent cysts or necrosis. There is diffuse increased attenuation surrounding the right TMJ with speckled areas of high attenuation, suggestive of hemosiderin deposition and calcification (arrows). B, Axial CT scan of the skull base (bone windows) shows destruction of the right sphenoid and temporal bones. C, Contrast-enhanced coronal T1-weighted MR image (700/20/2 [TR/TE/excitations]) shows areas of low signal intensity associated with mostly peripheral enhancement within the large tumor. The tumor has invaded the temporal bone and is slightly compressing the inferior right temporal lobe. There is thickening and enhancement in the right temporalis muscle (arrow). D, Coronal T2-weighted MR image (2600/100/1) shows blooming of the abnormal low signal intensity within the tumor, consistent with hemosiderin deposition. Multiple areas of focal high signal intensity are seen also, suggestive of cysts or multifocal necrosis. The right temporalis muscle is again noted to be markedly thickened, with diffuse increase in signal. E, Superselective digital subtraction angiogram of the right internal maxillary artery shows extensive hypervascularity of the tumor with a prominent neovascular blush and focal areas of unusual puddling of contrast material (arrow). F, Photomicrograph of a surgical pathologic specimen shows extensive iron deposition (black stain) within histiocytes (arrows). Note also the presence of multinucleated giant cells (not staining) and a fibrous background (Prussian blue stain, original magnification ×20). Joshua A. Bemporad et al. AJNR Am J Neuroradiol 1999;20:159-162 ©1999 by American Society of Neuroradiology