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Concomitant fenestration and phlebectasia of the right internal jugular vein: a unique finding in anatomical dissection

100%

Cvetko E., Meznaric M.

Folia Morphologica

2017

tom 76

nr 3

The internal jugular vein (IJV) is an important vascular structure for oncologists and radiologists and is also a frequently used central venous route. The variations in the pattern of its course, and knowledge of its variations, are important. During the anatomical dissection of a 70-year-old male cadaver, fenestration involving a short segment (2.5 cm) of the right IJV in the superior part of the carotid triangle and a large dilatation (phlebectasia) of the IJV, involving its nonfenestrated segment were found — a case that has not previously been reported. The aetiology and clinical implications of the concurrent anomalies are described. Clinicians and surgeons performing neck vascular or reconstructive surgery should be made aware of both IJV variations in order to prevent inadvertent injury and avoid invasive investigations and inappropriate treatment. (Folia Morphol 2017; 76, 3: 519–522)

Factors affecting composition of gravel bar vegetation in middle reach of a lowland river

80%

Skornik S., Meznaric M., Kaligaric M.

Polish Journal of Ecology

2017

tom 65

nr 2

In this study, we investigated plant communities in relation to site-specific morphological properties and sediment structure on gravel bars along the middle Drava River in Slovenia. We sampled 143 plots of 5 × 5 m using species cover-abundance estimates. In addition, we considered the following habitat physical variables: elevation above the water line, texture of the substrate (silt, sand, gravel content) and bar age. Based on TWINSPAN method, we distinguished four vegetation types: (G1) xerophilic and thermophilic ruderal stage; (G2) stage with sparse and herb-rich ruderal vegetation with species of semi-dry grasslands; (G3) initial vegetation stage of frequently disturbed mesotrophic and eutrophic sites and (G4) tall-willow stage. The most important factors determining a bar's vegetation were elevation and gravel content. Our study shows that gravel bars of the middle Drava river system form a suitable habitats for species-rich plant communities. Their diversity is a function of high spatial heterogeneity coupled with the opposing forces of stress and disturbance.

Ograniczanie wyników

1 Folia Morphologica

1 Polish Journal of Ecology

2 Meznaric M.

1 Cvetko E.

1 Kaligaric M.

1 Skornik S.

2 2017

Wyniki wyszukiwania

Concomitant fenestration and phlebectasia of the right internal jugular vein: a unique finding in anatomical dissection

Factors affecting composition of gravel bar vegetation in middle reach of a lowland river