Factors influencing faculty attitudes may not be easy to identify and may be specific for different settings. Their identification and management is necessary for producing sustainable curriculum reform.

Melanomas show a higher level of VEGF expression. Nodular and acral lentiginous types of melanoma show a high level of VEGF expression, while superficial spreading melanoma shows a lower level of VEGF expression. Melanomas in higher-stage disease (Breslow, Clark, pTNM) show a higher level of VEGF expression.

This assessment exercise in 5 medical schools showed that constructive and structured evaluation of medical education is possible, even in complex and unfavourable conditions. Medical schools in Bosnia and Herzegovina have successfully formed a national consortium for formal collaboration in curriculum development and reform.

Kratak sadržajUvod. Nucleus ruber zauzima centralni dio retikularne formacije srednjeg mozga, od donjeg kraja gornjih kvržica srednjeg mozga do ventralnog talamusa. Vaskularizuju ga grane P 1 i P 2 segmenta arteriae cerebri posterior, arteriae communicans posterior i arteriae choroidea anterior. Ciljevi rada su kvantitativna analiza neurona i vaskularne mreže magnocelularnog dijela nucleus ruber-a, kao i ispitivanje uticaja starenja na parametre kvantitativne analize.Metode. Deset srednjih mozgova odraslih lica oba pola je nakon fiksacije u 10% rastvoru formalina ukalupljeno u parafinu. Zbog lokalizacije magnocelularnog dijela nucleus ruber-a, uzorci srednjih mozgova su presječeni u visini sredine gornjih kvržica srednjeg mozga i idući kaudalno pravljeni su semiserijski rezovi (1,5,10...50) debljine 4 µm, koji su bojeni Mallory metodom. Pomoću digitalne kamere slikano je intermitentno svako drugo vidno polje pod uvećanjem 400x, a dobijene fotografije su analizirane pomoću programa ImageJ, uz korišćenje testnog sistema A 100. Statistička analiza je obavljena uz upotrebu programa SPSS, uz nivo značajnosti razlike od 5%.Rezultati. Prosječne vrijednosti kvantitativnih parametara neurona su iznosile: volumenska gustina 0,018 mm 0 , površinska gustina 3,56 mm -1 i apsolutni broj po vidnom polju 35,39. Prosječna volumenska gustina vaskularne mreže magnocelularnog dijela nucleus ruber-a je 0,014 mm 0 , površinska gustina 4,19 mm -1 i dužinska gustina 90,82 mm -2 . Nije postojala korelacija između godina života i određivanih kvantitativnih parametara neurona i vaskularne mreže magnocelularnog dijela nucleus ruber-a.Zaključak. Ispitivani kvantitativni parametri neurona i vaskularne mreže magnocelularnog dijela nucleus ruber-a se smanjuju sa godinama života, ali smanjenje nije statistički značajno.

Melanocytic nevi represent a benign neoplastic proliferation of melanocytes. The level of vascular endothelial growth factor expression in these proliferations is low in most cases; whereas an increased expression of this factor may be an indicator of pre-neoplastic changes in melanocyte lesions. We performed a semi-quantitative assessment of the level of vascular endothelial growth factor expression (score 0 to 3) on samples taken from 34 patients with benign melanocyte alterations of the skin. Melanocytic nevi showed an expression of vascular endothelial growth factor in 79.41% of the cases. The low level of expression (score 1) was seen in 70.59% cases. The results showed no statistically significant difference in the presence and level of vascular endothelial growth factor expression in relation to the following morphological parameters: histological type, a defect in the surface, density of inflammation infiltrate, mitotic index, growth phase and cell type.

Sažetak. Neuroni ekstraokularnih motornih jedara (nucleus nervi oculomotorii principalis, nucleus nervi trochlearis et nucleus nervi abducentis) su zaobljeni multipolarni, rjeđe fuziformni ili ovalni motoneuroni, blijedog jedra i nepravilno raspoređenih Nisslovih tjelašaca. Cilj rada je da se odrede stereološki parametri neurona ekstraokularnih motornih jedara (volumenska i površinska gustina, i apsolutni broj po mm² površine). Istraživanje je obavljeno na 30 moždanih stabala čovjeka, oba pola, bez dijagnostikovanih neuroloških oboljenja, stratificiranim prikupljanjem uzoraka u transverzalnoj ravni. Semiserijski parafinski rezovi (debljine 0,3 µm) su bojeni Mallory metodom. Uz korišćenje mikroskopa na histološkim presjecima su identifikovana ekstraokularna motorna jedra i pomoću digitalne kamere slikano je intermitentno svako drugo vidno polje pod uvećanjem 400x. Dobijene slike su analizirane pomoću programa ImageJ, verzija 1.42e (National Institutes of Health, Bethesda, USA) uz korišćenje testnog sistema A 100. Statistička analiza je obavljena uz upotrebu programa SPSS (verzija 16.0) uz nivo značajnosti razlike od 5%. Statistički značajna razlika (p<0,05) postojala je u volumenskoj i površinskoj gustini, i apsolutnom broju neurona po mm² površine između nc.nervi oculomotorii principalis i nc.nervi trochlearis. Između nc.nervi oculomotorii principalis i nc.nervi abducentis statistički značajna razlika postoji u volumenskoj gustini, dok se između nc.nervi trochlearis i nc.nervi abducentis razlika pronalazi u vrijednosti površinske gustine i apsolutnog broja neurona po mm² površine.

In the semiquantitative evaluation, collagen type I expression in osteoarthritic menisci was significantly lower compared to macroscopically unchanged menisci. The decrease in the expression level correlates with the increase in the grade of macroscopic meniscal damage. There was no statistically significant difference in the quantitative evaluation of expression.

Introduction. Subcortical auditory centers have several sources of blood supply. Cochlear nuclei are vascularized by the anterior inferior cerebellar artery. Superior cerebellar and posterior cerebral arteries supply the inferior colliculus nucleus, while the medial geniculate body nucleus is supplied by several posterior cerebral artery branches. The aim of the research was to quantify the vascular network of subcortical auditory centers. Methods. Twelve adult brains, both sexes, aged 21 to 78 years, without signs of neurological diseases were analyzed in this study. Samples for histological sections, stained by the Mallory method, were obtained from strata cut at levels: the junction of the middle and rostral thirds of the oliva, the inferior colliculi, and the thalamic pulvinar. Volume, surface, and length density of the vascular network of subcortical auditory centers were analyzed stereological parameters. Results. All parameters had the highest values in the medial geniculate body nucleus. Statistically significant difference was found in the volume, surface, and length density between vascular networks of the cochlear nuclei and medial geniculate body nucleus, and between inferior colliculus nuclei and medial geniculate body. Vessels in cochlear nuclei and inferior colliculus nuclei differed only in length density. Conclusion. Cochlear nuclei and inferior colliculi nuclei blood vessels have a similar density and diameter, but vessels in inferior colliculi nuclei are more tortuous. In the medial geniculate body nucleus vessels are larger, denser and more tortuous compared to the other two subcortical auditory centers.