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  • 1
    Electronic Resource
    Electronic Resource
    Aspergillosis of the sphenoid sinus simulating a pituitary tumor (1989)
    Springer
    Neuroradiology 31 (1989), S. 362-363 
    Details
    ISSN: 1432-1920
    Keywords: Aspergillosis ; Pituitary abscess ; Trans-sphenoidal surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sphenoidal aspergillosis is an unusual cause of sella turcica enlargement. Pituitary abscess secondary to Aspergillus had been reported. In the present case, a woman with sphenoid sinus aspergillosis mimicked a pituitary tumor. This patient survived her infection with intact pituitary function following a transsphenoidal approach. No postoperative amphotericine-B and 5-fluorocytosine were necessary. CT scan revealed a mass occupying the sphenoid sinus extending to the sella turcica. Factors that should alert the clinican to the presence of a sphenoidal and pituitary abscess in a patient with sella turcica enlargement are prior episodes of sinusitis, meningitis and immunosuppression and, as in the present case, hyperglycemia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00344187
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stiefel–Whitney surfaces and the tri-genus of non-orientable 3-manifolds (1999)
    Springer
    Manuscripta mathematica 100 (1999), S. 405-422 
    Details
    ISSN: 1432-1785
    Keywords: Mathematics Subject Classification (1991):57N10, 57M50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract: Every non-orientable 3-manifold M can be expressed as a union of three orientable handlebodies V 1,V 2,V 3 whose interiors are pairwise disjoint. If g i denotes the genus of ∂V i and g 3≤g 2≤g 3, then the tri-genus of M is the minimum triple (g 1,g 2,g 3), ordered lexicographically. If the Bockstein of the first Stiefel–Whitney class βw 1(M)=0, then M has tri-genus (0,2g,g 3), where g is the minimal genus of a 2-sided Stiefel Whitney surface of M. In this paper it is shown that, if βw 1(M)&\ne;0, then M has tri-genus (1,2g−1,g 3), where g is the minimal genus of a (1-sided) Stiefel–Whitney surface. As an application the tri-genus of certain graph manifolds is computed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002290050209
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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