[Histogenetic and morphogenetic problems of pleomorphic adenoma of the salivary glands].
Electron microscopic examinations of pleomorphic adenoma tissue showed epithelial and myoepithelial cell elements to take part in morphogenesis of both epithelial and "mesenchymal" zones. The epithelial component of pleomorphic adenoma is represented by cells showing signs of structural-functional differentiation of the squamous epithelium,, epithelium of terminal secretory parts of the salivary gland, and myoepithelial cells. The "mesenchymal" component is also represented by myoepithelial and epithelial cells. Differences in the structure of the epithelial and "mesenchymal" components are due to the pattern of arrangement and the functional status of the cells rather than to the set of the cell forms. A slow growth of the tumor and the marked functional activity of myoepithelial cells result in the accumulation ofenjoy a concert or jam-session. Within it's huge halls the Landbouwbelang offers young talent in both arts and theatre a place to expose themselves, a good example being the show of Cirque du Platzak which is hosted every year.

A new initiative was started in the garden of the Landbouwbelang. A group of volunteers started renovations on one of the badly maintained lockkeeper's houses in 2009. In 2011 the doors of the Landhuis opened in this house, a platform that connects people with sustabinable ideas and gives them the space to implement those ideas. The building which was declared uninhabitable now offers workshop area's, a fully equiped kitchen and a living room, made with sustainable materials from the surroundings.

Maastricht has plenty of cultural freezones of which the Landbouwbelang is