(A) Axial T1-weighted image in a young patient with a slowly enlarging right parotid mass shows a round, well-circumscribed lesion of intermediate signal.

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USEFULNESS OF MRI IN THE DIAGNOSIS OF SALIVARY GLAND PATHOLOGIES
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[C from: Markowitz SK, Ziter FHM: The lateral chest film and pneumoperitoneum. Ann Emerg Med 1986;15:425–427, with permission.] Source: Chapter II-3. Pneumoperitoneum,
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Sagittal MR images of the knee showing meniscal tear
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(b) Higher magnification shows that principal cells have round central nuclei and pale-staining cytoplasm. Cords of principal cells secreting PTH surround.
Multiple hepatic cysts in the setting of ADPKD
Pseudocyst. (A) Axial noncontrast CT shows a nonspecific hypodense cystic lesion in the tail of the pancreas (white arrow) with a thin rim. Patient reported.
Vitamin B12 deficiency myelopathy in a 30-year-old woman, wheelchair-bound owing to an 18-month history of progressive myelopathy. B12 level: 60 pg/mL.
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A: Axial T1 MRI without contrast demonstrates a large mass near the inferior left basal ganglia containing areas of bright signal (thrombus or slow-moving.
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MRI of pleomorphic adenoma
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Small bowel obstruction
Sagittal magnetic resonance T1-weighted image with contrast of the lumbar spine demonstrating diskitis/osteomyelitis associated with a spinal epidural.
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Figure 3 Bone marrow lesions in osteoarthritis
A and B, Sagittal (A) and axial (B) fast spin-echo images of the cervical spine before treatment demonstrate diffuse increase in signal intensity (arrows)
A 76-year-old man with a carcinoma ex pleomorphic adenoma (case 2).
George S. Georgiadis, MD, Miltos K
Meningioma. Meningioma. (A) T1 weighted image demonstrates a well-circumscribed intradural extramedullary mass that is isointense to the spinal cord. (B)
Radiological imaging in primary parotid malignancy
Traumatic stump neuroma.
Case 2. Case 2. A, Axial T1-weighted image (spin-echo: TR/TE, 650/9.3) shows a lobulated mass in the right parotid gland, with a low-signal-intensity well-defined.
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Axial contrast-enhanced CT (A) and sagittal contrast-enhanced reformatted (B) images reveal a well-defined ovoid mass with homogeneous intense enhancement.
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(A) Axial T1-weighted image in a young patient with a slowly enlarging right parotid mass shows a round, well-circumscribed lesion of intermediate signal intensity. Also indicated are the parotid glands (P), parapharyngeal space (PPS), internal jugular vein (IJV), internal carotid artery (C), lateral mass of C1 (C1), and the spinal cord (SC). (B) The mass is very bright on a fast spin-echo T2-weighted image with fat saturation. (C) Following gadolinium, the lesion enhances intensely and homogeneously. These are the typical imaging features of a pleomorphic adenoma and this diagnosis was confirmed pathologically. Source: Chapter 3. Radiology, CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e Citation: Lalwani AK. CURRENT Diagnosis & Treatment in Otolaryngology—Head & Neck Surgery, 3e; 2012 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/lalw3/lalw3_c003f058b.png&sec=39944993&BookID=386&ChapterSecID=39944034&imagename= Accessed: October 20, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved