Microvascular architecture of human epicolic and paracolic lymph nodes located in the vicinity of colon cancer: a SEM study of corrosion casts.

The vascular systems of epicolic and paracolic lymph nodes located in the vicinity of colon tumors resected from three patients were investigated by corrosion casting and scanning electron microscopy. Large vessels entered the nodes either at one site, not always corresponding with the anatomical hilus, or at 2-4 sites located along their perimeters. In the cortical zone of most examined nodes, the location of lymphoid nodules was marked by rosette-like capillary arrays drained by peripheral arcuate venules.

Vascular architecture of human uterine cervix visualized by corrosion casting and scanning electron microscopy.

Background: In contrast to the uterine corpus, the vascular architecture of the human cervix has been the subject of only a few studies, mostly dealing with the ectocervical mucosal vessels. This study presents the vascular system of the cervical wall surrounding the endocervical canal visualized by the best currently available technique, corrosion casting combined with scanning electron microscopy.

Methods: Uteri collected at autopsy (n= 20) were perfused via afferent vessels with fixative followed by Mercox resin and corroded after polymerization of the resin.

[Reoperations in patients with chronic otitis media cholesteatomatosa].

Introduction: Chronic cholesteatoma otitis media, apart from destruction of bones and possibility of otogenous complications, is characterized by possibility of recurrence of the disease after non radical treatment or presence of risk factors.

Aim: This paper intends to analyze changes typical for cholesteatoma, observed during otosurgery including the results of bacteriological investigations.

Material And Methods: Nearly 450 otosurgeries were performed in Department of Otolaryngology at Jagiellonian University 2004-2007.

Vascular system of human fetal pancreas demonstrated by corrosion casting and scanning electron microscopy.

Vascular architecture of the human pancreas was investigated by corrosion casting combined with scanning electron microscopy in fetuses aged 20 and 25 gestational weeks. The general pattern of the microvascular system was similar to that of the postnatal pancreas, with an evident insulo-acinar portal system and with three types of capillary networks: capillaries of exocrine lobules, islet capillaries and periductal capillaries around large ducts located in the interlobular septa. All these capillary networks were supplied by arteriolar branches of the interlobular arteries.

Arterial supply and venous drainage of the choroid plexus of the human lateral ventricle in the prenatal period as revealed by vascular corrosion casts and SEM.

The topography of the arterial supply and venous drainage was visualised by corrosion casting and scanning electron microscopy in the human foetal (20 weeks) choroid plexus of the lateral ventricle. Although secondary villi were not yet present at that developmental stage, the topography of the large arteries and veins almost fully corresponded to that described in adult individuals. The only major difference observed was a lack of the typical tortuosity of the lateral branch of the anterior choroidal artery and of the superior choroidal vein, which probably develops during further expansion of the vascular system associated with the formation of secondary villi.