Search results for "Stata"
showing 10 items of 128 documents
PROSTATA (PROSTATITI, IPERTROFIA PROSTATICA, CANCRO DELLA PROSTATA)
2008
Prostatas biopsijas ar attēlu sapludināšanas metodi rezultātu analīze atkarībā no prostatas tilpuma, PSA un PSA blīvuma
2021
Prostatas vēzis ir visbiežāk diagnosticētais ļaundabīgais audzējs visā pasaulē. Dažādos avotos kā nāves cēlonis tas svārstās no ceturtās līdz sestajai vietai. Lielāko daļu pacientu sastāda lēni augoši, mazagresīvi audzēji. Sākuma stadijās prostatas audzējs ir asimptomātiksks, Diagnoze galvenokārt balstās uz prostatas specifiskā antigēna (PSA) testēšanu un ar transrektālu ultraskaņu vadītu (TRUS) prostatas audu biopsiju. Avoti gan liecina, ka skrīninga PSA testēšana joprojām nav gana sensitīva diagnostiskā metode. Mērķis: Zinātniskā pētījuma mērķis ir atrast, kādi faktori ietekmē indikācijas attēlu sapludināšanas biopsijai un kādi faktori ietekmē pozitīvu attēlu sapludināšanas biopsiju prost…
Biosilicification of loricate choanoflagellate: organic composition of the nanotubular siliceous costal strips of Stephanoeca diplocostata.
2010
SUMMARY Loricate choanoflagellates (unicellular, eukaryotic flagellates; phylum Choanozoa) synthesize a basket-like siliceous lorica reinforced by costal strips (diameter of approximately 100 nm and length of 3 μm). In the present study, the composition of these siliceous costal strips is described, using Stephanoeca diplocostata as a model. Analyses by energy-dispersive X-ray spectroscopy (EDX), coupled with transmission electron microscopy (TEM), indicate that the costal strips comprise inorganic and organic components. The organic, proteinaceous scaffold contained one major polypeptide of mass 14 kDa that reacted with wheat germ agglutinin. Polyclonal antibodies were raised that allowed …
Extensive sampling sheds light on species-level diversity in Palearctic Placobdella (Annelida: Clitellata: Glossiphoniiformes)
2022
The bloodfeeding leech genus Placobdella is dominated by North American diversity, with only a single nominal species known from Central America and one from the Palearctic region. This is likely due to considerable underestimation of Palearctic biodiversity, but investigations into potential hidden diversity are lacking. To shed light on this, the present study introduces new data for specimens initially identified as Placobdella costata from Ukraine (close to the type locality), Italy, Germany, Latvia, Montenegro, Bulgaria, Slovenia, Turkey, Azerbaijan, Tunisia, and Algeria, and uses both nuclear (Internal Transcribed Spacer [ITS] region) and mitochondrial (cytochrome c oxidase subunit I …
Establishing the relative importance of sympatric definitive hosts in the transmission of the sealworm, Pseudoterranova decipiens: a host-community a…
2001
The importance of a given host to a particular parasite can be determined according to three different criteria: host preference, host physiological suitability and host contribution to transmission. Most studies on the sealworm Pseudoterranova decipiens have focussed on the latter factor, but few attempts have been made to develop a quantitative transmission model evaluating the relative importance of each host. The purpose of this study was to propose a flow-chart model to study sealworm transmission within a seal community. The model was applied to hypothetical data of four seal species acting as definitive hosts of P. decipiens sensu stricto in eastern Canada: harp seal Phoca groenlandi…
L'hsp60 e l'hsp10 sono iperespresse durante la cancerogenesi prostatica
2003
RUOLO DEL COEFFICIENTE APPARENTE DI DIFFUSIONE (ADC) NELLO STUDIO DELLA PROSTATA IN RISONANZA MAGNETICA (RM)
2014
Materiali e Metodi: La nostra popolazione è costituita da 25 di età compresa tra 50 e 81 anni (media 63.95 +/- 9.54) sottoposti ad esame RM della prostata con apparecchiatura da 1.5 T mediante l'ausilio di bobina endorettale. Oltre al protocollo morfologico (T1w-T2w) , la valutazione spettroscopica e dinamica post-contrastografica, sono state acquisite sequenze DWI sul piano assiale con valori di b pari a 800/mm2. E' stato calcolato il valore di ADC in regioni di interesse poste in corrispondenza di aree di zona periferica (ZP) con aspetto normale ed aree che presentavano segnale ipointenso enne sequenze T2w e/o che mostravano restrizione della diffusione dell'acqua nelle sequenze DWI. All'…
Sequenze di diffusione (DWI) nello studio del carcinoma prostatico: confronto tra b700 e b1400. Nostra esperienza
2014
Materiali e metodi: e' stato analizzato retrospettivamente un campione di 24 pazienti nei quali è stato posto il sospetto RM di CaP confermato all'esame istologico in 20 pazienti. Questi, di età compresa tra 47 e 76 anni (media 64+/- 10), hanno costituito la nostra popolazione. L'esame RM è stato eseguito con un'apparecchiatura da 1.5 T mediante l'ausilio di bobina endorettale. Oltre al protocollo (T2, T1), la valutazione spettroscopica e dinamica postcontrastografica sono state acquisite sequenze DWI sul piano assiale con valori di b pari a 700 e 1400 s/mm2. Le immagini morfologiche e di diffusione sono state analizzate da due radiologi in consenso. E' stato calcolato il coefficiente di di…
RISONANZA MAGNETICA (RM) MORFOLOGICA E FUNZIONALE NELLO STUDIO DELL'ADENOCARCINOMA PROSTATICO (CAP)
2014
Obiettivi didattici. Illustrare i reperti morfologici e funzionali del CaP, all'imaging RM. Introduzione. La RM è una metodica fondamentale nello studio del CaP; oltre all'imaging morfologico, permette importanti acquisizioni funzionali che aumentano la sua performance diagnostica. Tecnica d'esame. Lo studio RM della prostata prevede sequenze assiali t1, assiali, coronali e sagittali T2, DWI, sequenze spettroscopiche e sequenze perfusioni (GE T1w 3d fat-sat). In T1 la prostata ha intensità di segnale medio-bassa omogenea, senza possibilità di distinzione dell'anatomia zona e ghiandolare o d'identificazione di eventuali CaP. Queste sequenze permettono la visualizzazione di eventuali residui …
Prostatas biopsijas ar attēlu sapludināšanas metodi rezultātu analīze atkarībā no PI-RADS klasifikācijas
2021
Ievads. Prostatas audzējs (PCa) pēc izplatības vīriešiem ierindojas 2. vietā Latvijā. Jaunveidojumu diagnostikā pastāv zelta standarts – transrektālas ultraskaņas vadīta (TRUS) biopsija, tomēr PCa bieži vien ir multifokāls, bet biopsijas laikā tiek paņemta maza prostatas audu daļa. Ir pieejama cita biopsijas metode- ar attēlu sapludināšanas metodi (fusion-biopsija), kad TRUS-biopsija tiek veikta vienlaicīgi ar magnētiskās rezonanses izmeklējuma (MR) palīdzību. Šajā pētījumā tika noskaidrota, prostatas attēlveidošanas ziņošanas un datu vērtēšanas sistēmas (PI-RADS) pēc daudzparametru MR (mpMR) rādītāju korelācija ar histopatoloģiskajām atbildēm pēc fusion-biopsijas. Pētījuma mērķis. Izvērtēt…