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932. Absces mozku jako první klinická manifestace hereditární hemoragické teleangiektázie – tři kazuistiky
- Creator:
- Hanoun, George, Vybíhal, Václav, Sova, Marek, Boudný, Jaroslav, Svoboda, Tomáš, and Smrčka, Martin
- Format:
- print, text, and regular print
- Type:
- model:article, article, Text, kazuistiky, práce podpořená grantem, and TEXT
- Subject:
- hereditární hemoragická teleangiektazie--diagnóza--etiologie--terapie, absces mozku--diagnóza--etiologie--terapie, arteriovenózní malformace--diagnóza--etnologie--terapie, epistaxe--diagnóza--etiologie--terapie, mezioborová komunikace, mutace--genetika, vaskulární endoteliální růstové faktory--izolace a purifikace, receptory buněčného povrchu, anamnéza, tomografie rentgenová počítačová--metody--využití, magnetická rezonanční tomografie--metody--využití, digitální subtrakční angiografie--metody--využití, statistika jako téma, výsledky a postupy - zhodnocení (zdravotní péče), dospělí, lidé středního věku, ženské pohlaví, and lidé
- Language:
- Czech and English
- Description:
- Hereditární hemoragická teleangiektázie neboli morbus Rendu‑Osler‑Weber je fibrovaskulární dysplazie s autozomálně dominantní dědičností charakteristická přítomností teleangiektázií a arteriovenózních malformací kůže, sliznic a vnitřních orgánů. Plicní arteriovenózní malformace jako zdroj septických embolů mohou zapříčinit vznik mozkového abscesu, který tak bývá prvním a často jediným projevem heriditární hemoragické teleangiektázie. V práci jsou prezentovány tři kazuistiky pacientů trpících touto chorobou, kde prvním a závažným příznakem byl vzniklý mozkový absces. Protože se jedná o relativně vzácné onemocnění, nebývá vždy zvažováno v rámci diferenciální diagnostiky a tím pádem ani diagnostikováno. U každého pacienta s mozkovým abscesem je nezbytné na toto onemocnění pomýšlet a v případě podezření je nutné jej řádně vyšetřit. Při verifikované plicní arteriovenózní malformaci je třeba ji ošetřit a zabránit tak vzniku recidivujících mozkových abscesů. Péče o tyto pacienty je komplexní a multioborová., Hereditary hemorrhagic telangiectasia or Rendu‑Osler‑Weber disease is an autosomal‑dominant disorder that results in fibrovascular dysplasia and is characterized by telangiectases and arteriovenous malformation of the skin, mucosa and viscera. Pulmonary arteriovenous malformations as a source of septic emboli may give rise to brain abscess that so often is the first and only clinical manifestation of hereditary hemorrhagic telangiectasia. Three cases of patients suffering from this disease with brain abscess as the first and serious symptom are presented. Since this is a relatively rare disease, it is not always considered in the differential diagnosis and thus not diagnosed. This disease has to be considered in patients with brain abscess and, in case of a suspicion, it must be properly examined. When pulmonary arteriovenous malformation is verified, it has to be treated in order to prevent recurrent brain abscesses. Care of these patients should be comprehensive and multidisciplinary. Key words: hereditary hemorrhagic telangiectasia – Rendu-Osler-Weber disease – brain abscess – arteriovenous malformation – epistaxis – endoglin The authors declare they have no potential conflicts of interest concerning drugs, products, or services used in the study. The Editorial Board declares that the manuscript met the ICMJE “uniform requirements” for biomedical papers., and G. Hanoun, V. Vybíhal, M. Sova, J. Boudný, T. Svoboda, M. Smrčka
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
933. Absence of sex chromatin corresponds with a sex-chromosome univalent in females of Trichoptera
- Creator:
- Marec, František and Novák, Karel
- Type:
- article, model:article, and TEXT
- Subject:
- Cytogenetics, Trichoptera, Anabolia furcata, Hydropsyche sp., Limnephilus decipiens, Polycentropus flavomaculatus, Rhyacophila sp., sex chromatin, and sex chromosomes
- Language:
- English
- Description:
- Five Trichoptera species, representing four different families of three suborders, have been examined for sex chromatin status in relation to their sex chromosome system. These were Hydropsyche sp., Polycentropus flavomaculatus (Pictet), Rhyacophila sp., Anabolia furcata Brauer and Limnephilus decipiens (Kolenatý). None of the species displayed sex-specific heterochromatin in highly polyploid nuclei of the Malpighian tubule cells. Such sex chromatin is a characteristic trait of the heterogametic female sex in the sister order Lepidoptera; it is derived from the heterologous sex chromosome W. Hence, the absence of sex chromatin in somatic nuclei of Trichoptera females indicated the lack of a W chromosome in their karyotype. Correspondingly, diploid chromosome sets of the females consisted of an odd chromosome number, two sets of autosomes and one sex chromosome Z. Thus, the Z/ZZ chromosome mechanism of sex determination has been confirmed. In pachytene and postpachytene oocytes, the Z chromosome having no pairing partner formed a univalent. In Hydropsyche sp., the Z-univalent was distinct as a compact, positively heteropycnotic element. Whereas, in two other caddis-flies, P. flavomaculatus and L. decipiens, it formed a negatively heteropycnotic thread. In postpachytene nuclei of nurse cells of A. furcata, two sister chromatids of the Z chromosome separated as a result of chromosome degeneration and formed a negatively heteropycnotic pseudobivalent. The species-specific differences in pycnosis may reflect a transcriptional activity/inactivity of the Z chromosome during meiotic prophase. The absence of sex chromatin and the sex chromosome system in Trichoptera are characters in common with the "primitive" Lepidoptera. This supports a hypothesis that the commcommon with the "primitive" Lepidoptera. This supports a hypothesis that the common ancestor of both orders had a ZJZZ sex chromosome mechanism.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
934. Absolute continuity theorems for abstract Riemann integration
- Creator:
- de Amo, E., del Campo, R., and Díaz-Carillo, .M.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- finitely additive integration, abstract Riemann integration, and absolute continuity
- Language:
- English
- Description:
- Absolute continuity for functionals is studied in the context of proper and abstract Riemann integration examining the relation to absolute continuity for finitely additive measures and giving results in both directions: integrals coming from measures and measures induced by integrals. To this end, we look for relations between the corresponding integrable functions of absolutely continuous integrals and we deal with the possibility of preserving absolute continuity when extending the elemental integrals.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
935. Absorption in stochastic epidemics
- Creator:
- Štěpán, Josef and Staněk, Jakub
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- SIR epidemic models, stochastic epidemic models, stochastic differential equation, strong solution, weak solution, absorption, and Kermack-McKendrick model
- Language:
- English
- Description:
- A two dimensional stochastic differential equation is suggested as a stochastic model for the Kermack-McKendrick epidemics. Its strong (weak) existence and uniqueness and absorption properties are investigated. The examples presented in Section 5 are meant to illustrate possible different asymptotics of a solution to the equation.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
936. Abstract Korovkin type theorems on modular spaces by A-summability
- Creator:
- Taş, Emre
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- A -summability, modular space, and abstract Korovkin theory
- Language:
- English
- Description:
- Our aim is to change classical test functions of Korovkin theorem on modular spaces by using A -summability.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
937. Abstract Riemann integrability and measurability
- Creator:
- de Amo, E., del Campo, R., and M. Díaz
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- finitely additive integration, localized convergence, integral representation, weak continuity conditions, and horizontal integration
- Language:
- English
- Description:
- We prove that the spectral sets of any positive abstract Riemann integrable function are measurable but (at most) a countable amount of them. In addition, the integral of such a function can be computed as an improper classical Riemann integral of the measures of its spectral sets under some weak continuity conditions which in fact characterize the integral representation.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
938. Abstract theory of variational inequalities with Lagrange multipliers and application to nonlinear PDEs
- Creator:
- Fukao, Takeshi and Kenmochi, Nobuyuki
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Lagrange multiplier and parabolic variational inequality
- Language:
- English
- Description:
- Recently, we established some generalizations of the theory of Lagrange multipliers arising from nonlinear programming in Banach spaces, which enable us to treat not only elliptic problems but also parabolic problems in the same generalized framework. The main objective of the present paper is to discuss a typical time-dependent double obstacle problem as a new application of the above mentioned generalization. Actually, we describe it as a usual parabolic variational inequality and then characterize it as a parabolic inclusion by using the Lagrange multiplier and the nonlinear maximal monotone operator associated with the time differential under time-dependent double obstacles.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
939. Abstract Weyl-type theorems
- Creator:
- Berkani, Mohammed
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- spectral valued function, partitioning, spectrum, and Weyl-type theorem
- Language:
- English
- Description:
- In this paper, we give a new approach to the study of Weyl-type theorems. Precisely, we introduce the concepts of spectral valued and spectral partitioning functions. Using two natural order relations on the set of spectral valued functions, we reduce the question of relationship between Weyl-type theorems to the study of the set difference between the parts of the spectrum that are involved. This study solves completely the question of relationship between two spectral valued functions, comparable for one or the other order relation. Then several known results about Weyl-type theorems become corollaries of the results obtained.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
940. Abstracts from "The Ninth Scientific Conference of the Charles University Faculty of Medicine and University Hospital", 25 January 2005, Hradec Králové
- Type:
- model:article and TEXT
- Language:
- English
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public