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  • Gadolinium  (1)
  • Key words: Obstructive azoospermia  (1)
  • Rejection, T-cell repertoire  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Immune repertoire of graft-invading T cells (1990)
    Springer
    Transplant international 3 (1990), S. 176-180 
    Details
    ISSN: 1432-2277
    Keywords: T-cell repertoire ; Organ transplantation, T-cell repertoire ; Rejection, T-cell repertoire
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The immune repertoire of T lymphocytes invading human allografts is of fundamental importance both at the operational level, in order to achieve relevant matching, and at the functional level, since the unique capacity of T and B cells to specifically recognize allogeneic components restricts the origin of the signals leading to rejection by these cells. In this paper, the authors review their own work, as well as other contributions in this domain, with special reference to the frequency and function of donor-committed cells among the infiltrate and the relationship between T-cell receptor gene rearrangements and repertoire.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00355467
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    0.5 T MRI of small renal masses: value of T2-weighted and Gd-DOTA-enhanced images (1993)
    Springer
    European radiology 3 (1993), S. 447-452 
    Details
    ISSN: 1432-1084
    Keywords: Gadolinium ; Kidney, benign tumours ; Kidney, cysts ; Kidney, MRI studies ; Kidney, neoplasms ; MRI, contrast enhancement
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We compared the value of T2-weighted and Gd-DOTA-enhanced T1-weighted images for the detection and characterisation of 33 small renal masses (14 clear cell carcinomas, 6 angiomyolipomas, 3 angiomyomas, 4 adenomas, 3 papillary carcinomas, 3 oncocytomas, 1 haemorrhagic cyst). Dynamic enhanced MRI was performed to study the tumoral vascular supply (19 cases). MRI depicted all the masses more than 1 cm in diameter, but missed all the lesions less than 1 cm (4 false-negative). The results of T2-weighted images and Gd-DOTA-enhanced images were similar as regards detection; however, Gd-DOTA-enhanced images depicted more clearly the tumours smaller than 2 cm (11 cases). MRI enabled the characterisation of only 3 masses (2 angiomyolipomas, 1 haemorrhagic cyst). New MRI features are described for oncocytomas (low signal intensity on T1-weighted images, high signal intensity on T2-weighted images, early and marked enhancement on dynamic enhanced MRI). Dynamic enhanced MRI did not contribute to the differentiation of benign from malignant tumours.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221422
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Imaging of obstructive azoospermia (1997)
    Springer
    European radiology 7 (1997), S. 1079-1085 
    Details
    ISSN: 1432-1084
    Keywords: Key words: Obstructive azoospermia ; Scrotal ultrasonography ; TRUS ; Endorectal MRI
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Obstructive azoospermia represents approximately 10 % of cases of male hypofertility. It is classified according to the volume of ejaculate. When the latter is normal a proximal obstruction is suspected. Scrotal sonography can help to detect dilation of the epididymal head when clinical findings are equivocal. Ejaculatory duct obstruction (EDO) is suspected when the volume of ejaculate is low. The use of transrectal ultrasonography (TRUS) plays a major role in the investigation of these patients, and endorectal MRI is a very useful adjunct in selected cases. The most common cause of EDO is congenital bilateral absence of vas deferens, which is now thought to be a genital form of cystic fibrosis in 80 % of cases. Consequently, a definitive diagnosis must be made before any attempt at in vitro fertilization. TRUS accurately visualizes abnormalities of the caudal junction of the vas deferens and seminal vesicles, yielding a definitive diagnosis without scrototomy. Other causes of EDO are congenital cysts compressing the distal part of the ejaculatory ducts and inflammatory distal stenosis. The former are accurately identified by TRUS, but the latter give more or less marked signs of obstruction which are only of value in azoospermic patients with a low-volume ejaculate. More invasive imaging is required to diagnose partial obstruction of the ED. Surgical vasography is still the reference, but puncture of the seminal vesicles under TRUS guidance is an attractive alternative, as it permits aspiration of seminal fluid (to seek motile sperm) and vasography without scrototomy. Lastly, endorectal MRI well assesses the relationships between the proximal prostatic urethra and the posterior wall of the ejaculatory ducts, which need to be precisely known when endoscopic resection of the ejaculatory ducts is planned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003300050258
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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