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  • 1
    ISSN: 1432-1084
    Keywords: Genitourinary system, ultrasound ; Hydronephrosis ; Ureteral calculi
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To assess whether the routine use of urography (IVU) is still needed in the management of patients with renal colic and suspected ureteral calculus obstruction, we prospectively evaluated 52 patients with renal colic by a combination of colour Doppler ultrasound (CDU) and plain abdominal radiography (KUB). Forty-six patients (88.4%) were successfully treated without the need for IVU. Urography was required as a pre-lithotripsy procedure (n = 4) and to confirm non-dilated ureteral calculus obstruction uropathy (n = 2). The inean resistive index (RI) in normal subjects (n = 14) was 0.62 ± 0.06 and in obstructed kidneys (n = 37) was 0.68 ± 0.07, the difference being statistically significant (p 〈〈 0.001 ). Eight patients with functionally significant high-grade obstruction had a mean RJ of 0.69 ± 0.06, absent ureteral jet and interrenal RI difference 〉0.07. CDU and KUB provide anatomical and functional information sufficient for the management of the great majority of patients with renal colic without the use of urography.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1084
    Keywords: Magnetic resonance imaging ; Osteoid osteoma ; Osteoblastoma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We assessed the value of contrast-enhanced fat-suppressed MRI on nine patients with osteoid osteomas and osteoblastomas. The results were compared with plain films, bone scintigraphy, computed tomography (CT) and pathological specimens. On contrast-enhanced fat-suppressed T1-weighted images the non-calcified nidi showed homogeneous enhancement, whereas the calcified lesions showed a ring enhancement sign that was proportional in intensity to the extent of the remaining part of the vascularized nidus. The degree of bone marrow and soft tissue enhancement was relative to the size and reactive inflammatory changes of the lesions. Although CT was diagnostic in most of the cases and more specific to show the calcified lesions, MRI was confirmatory in one case. We concluded that, although CT is the primary diagnostic investigation in osteoid osteomas, MRI can be reserved for equivocal cases.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1084
    Keywords: Spine infection ; Spine MRI studies ; Spine neoplasms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract MRI images of 135 patients with spine infection and 81 patients with spine neoplasm were retrospectively analysed in order to identify criteria that will help in distinguishing infection from neoplasm and in differentiating the forms of spine infection. Disc involvement occurred in 93% of infections and only 1% of neoplasms. Features of tuberculous spondylitis included paraspinal soft tissue abscesses (95%), vertebral collapse (91%), pathognomonic intraosseous abscess seen on Gd-enhanced images (84%), epidural extension (68%), gibbus (26%), skip lesions (16%) and posterior element involvement (11%). Pyogenic and brucellar infections had comparable features, i. e. predilection for the lower lumbar spine, preservation of vertebral morphology, minimal granulation tissue production and epidural extension. Primary neoplasms affected solitary vertebrate while secondary neoplasms demonstrated skip lesions and frequent extraosseous soft tissue masses. Posterior elements were frequently affected in both. MRI is a useful method for distinguishing infection from neoplasm in the spine and for differentiating tuberculous spondylitis from other infections in the majority of cases.
    Type of Medium: Electronic Resource
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