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.

Slides:

Advertisements

Similar presentations

Patient 4. Patient 4. Sinonasal carcinoma t(15;19). A, CT scan demonstrates a midline sinonasal tumor (arrow) with lytic bony destruction of the paranasal.

Advertisements

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

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.

Patient 2. Patient 2. A, An axial T1-weighted postcontrast image with fat saturation (600/13/2) demonstrates an irregular mass centered at the right cerebellopontine.

A 30-year-old man with PSA

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

The postcontrast axial CT image shows the SCSC as a hypoattenuated mass with poor enhancement. The postcontrast axial CT image shows the SCSC as a hypoattenuated.

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

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

Case 2: 14-year-old boy with headache, vomiting, dizziness, and ringing in the ear. Case 2: 14-year-old boy with headache, vomiting, dizziness, and ringing.

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.

MR images demonstrating a large left middle cranial fossa mass.

Contrast-enhanced coronal CT scan of a rabbit.

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.

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.

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

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.

Case 4: 25-year-old woman with pulsatile tinnitus.

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.

A, 55-year-old woman who underwent superficial parotidectomy 22 years before recurrence. A, 55-year-old woman who underwent superficial parotidectomy 22.

MR images.A, Axial view T2-weighted MR image reveals a low intensity lesion occupying the right mastoid with associated hyperintense debris.B, Axial view.

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,

Coronal FLAIR images (A–C) document decreasing left hippocampal mass effect and signal intensity over 5-year period (black arrowhead). Coronal FLAIR images.

Sarcoma growing into the left maxilla.

Spinal MR imaging.A, Coronal T2-weighted (TR/TE, 2500/120) thoracolumbar image shows widespread paravertebral soft tissue (arrowheads) and enlarged right.

High resolution bone algorithm CT scans.

CT scans obtained 2 months later

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

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),

Selected MR images obtained through the brain and orbits 3. 0 and 2

Case 2.A, Axial T2- and, B, T1-weighted MR images obtained 3 years after involved field radiation therapy at 3 years of age for a posterior fossa ependymoma.

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.

Case 3. Case 3. A 24-year-old woman with an oro- and hypopharyngeal lesion.A, Contrast-enhanced axial CT scan shows a soft-tissue mass in the right hypopharynx.

A 56-year-old man with fever for 1 week.

Case 1: 52-year-old woman with buzzing in right ear.

Case 2: Agenesis of the left ICA

Coronal postcontrast T1-weighted image of the orbits in patient 1 demonstrates a heterogeneously enhancing ovoid lesion involving the right medial rectus.

A 63-year-old man with left L5 radiculopathy on the electromyographic study, who underwent an operation 12 months ago. A 63-year-old man with left L5 radiculopathy.

Coronal T1-weighted contrast-enhanced MR image obtained in January of 1999 at the onset of right hearing impairment shows increased enhancement of the.

Axial contrast-enhanced CT scan shows ill-defined fat plane between the muscles. Axial contrast-enhanced CT scan shows ill-defined fat plane between the.

Axial contrast-enhanced CT scan shows bilateral facial soft-tissue tumor infiltration, bilateral enlarged middle cranial fossae (arrowheads), bilateral.

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 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.

Patient 1, a 50-year-old man presenting with a severe headache, diplopia, and the sensation of a “thick” tongue. Patient 1, a 50-year-old man presenting.

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

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

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.

Eight-week-old girl with large left periorbital hemangioma extending into left cavernous sinus, Meckel cave, and the left IAC.A, B, Axial T1 postcontrast,

Axial T2-weighted MR image shows normal flow void in the right internal jugular vein (arrows), whereas flow-related enhancement can be seen in the left.

A–C, Thin-section (1-mm) coronal and axial CT images of the skull base obtained with an edge-enhancing bone algorithm show enlargement (arrows) of the.

MR images in a 69-year-old woman with cervical and thoracic back pain.

Case 1. Case 1. A, Anteroposterior view of left common carotid artery demonstrates a DAVF at skull base. Fistula was located in superior aspect of dilated.

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, Right internal carotid artery angiographic approach for coiling of a right ophthalmic ICA aneurysm (black arrowhead) in a 71-year-old woman using 7.78.

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

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

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.

Patient 4, a 72-year-old man presenting with headache, dysphagia, and progressive hoarseness. Patient 4, a 72-year-old man presenting with headache, dysphagia,

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.

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.

KD involving bilateral buccal spaces in a 52-year-old man.

Case 1: 51-year-old woman with low back pain and right-sided sciatica for 6 months. Case 1: 51-year-old woman with low back pain and right-sided sciatica.

Presentation transcript:

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 tubarius and fossa of Rosenmüller (arrowheads) associated with infiltration of the left parapharyngeal space (arrows).B, Axial T2-weighted MR image through the nasopharyngeal region, obtained 1 month after A. A poorly defined mass lesion (short arrows) is visible in the left nasopharynx and parapharyngeal space. The lateral pterygoid muscle and the origin of the medial pterygoid muscle show high signal intensity, more or less isointense with fat (compare with opposite side). A region of lower signal intensity is also visible within the lesion, extending between the prevertebral muscles and the ICA (long arrow). A left-sided mastoidal effusion is also present.C, Axial contrast-enhanced T1-weighted MR image through the nasopharyngeal region, obtained at same time as B, shows an enhancing soft-tissue mass (arrowhead) in the left nasopharyngeal and retrostyloid compartment of the parapharyngeal space, extending around the left ICA (small white arrow) into the skull base (region of hypoglossal canal, long white arrow), and into the prevertebral muscles (small black arrows). The anterocranial part of the pterygoid muscles also shows some enhancement (large black arrow).D, Coronal contrast-enhanced T1-weighted image, obtained 4 months after B and C, shows further progression of the lesion, now extending up to the foramen ovale with associated enhancement on the floor of the middle cranial fossa (arrow).E and F, Axial T2-weighted (E) and contrast-enhanced T1-weighted (F) images, obtained 4 months after D, after a course of corticosteroids, show the mass lesion is clearly reduced in size. In E, low signal intensity is seen in the left parapharyngeal space, in the fat plane between the lateral pterygoid and temporalis muscle, and around the ICA (arrow). In F, enhancement is visible in and around the left lateral pterygoid muscle and around the left ICA; the normal signal void is not seen in this artery (arrow).G and H, Axial unenhanced (G) and contrast-enhanced fat-suppressed (H) T1-weighted images, obtained 5 months after E and F, when symptoms recurred. The lesion now extends into the left retromaxillary fat and pterygopalatine fossa (arrows, G) and into the orbital apex. Soft-tissue enhancement can be seen posterolaterally in the left orbit (long arrow, H). Absence of normal signal void is evident in the left ICA in the horizontal part of the left carotid canal (arrowhead, G) and in the left cavernous sinus. Sofie De Vuysere et al. AJNR Am J Neuroradiol 1999;20:1133-1139 ©1999 by American Society of Neuroradiology