Fencing bodes a rapid collapse of the unique Greater Mara ecosystem.

With land privatization and fencing of thousands of hectares of communal grazing areas, East Africa is struggling with one of the most radical cultural and environmental changes in its history. The 668,500-hectare Greater Mara is of crucial importance for the great migrations of large mammals and for Maasai pastoralist culture. However, the magnitude and pace of these fencing processes in this area are almost completely unknown.

[Arteritis as the cause of fatal coronary thrombosis].

Arteritis of the coronary arteries is a rare phenomenon. The cause is not always known. Transient ischaemia and even thrombosis of the arteries may be seen.

[Seminal vesicle cyst accompanied by unilateral hydronephrosis].

Seminal vesicle cysts are uncommon. Most often they are benign unilateral and associated with anomalies of the ipsilateral kidney. The clinical picture is characterized by a retrovesical cystic tumor which may be asymptomatic or cause nonspecific symptoms.

Microwave-assisted frozen section diagnosis. A comparison between conventional cryostat technique and the combination of freezing and microwave-stimulated fixation.

The study evaluates the morphology of frozen tissue sections treated by microwave-stimulated fixation compared with unfixed cryostat sections. Furthermore, microwave fixation has been compared with fixation at room temperature. Improved preservation of nuclear structures (chromatin pattern and nucleoli) was found with the microwave combination, while other parameters were indistinguishable from the unfixed cryostat sections.