Slow and progressive, cemento-ossifying fibroma is a rare benign tumor that reaches the maxilla and more frequently the mandible. The ossifying and cementifying fibromas are differentiated by their clinical, radiological, and histological findings. The authors discuss the pathogenesis and radiological signs guiding the choice of diagnostic and therapeutic methods. The treatment is surgical with an enucleation or wider resection with bone reconstruction for large fibromas.
When the Jesuit missionaries began to work in China, they attracted the attention of the Chinese by introducing European knowledge. This is the context in which Jesuits such as Matteo Ricci, Giulio Aleni, Francesco Sambiasi and Ferdinand Verbiest made their Chinese-language world maps. Sambiasi was a man of many talents. He was a tactful diplomat and a learned scientist. His world map shows him to be a skilful adapter of earlier knowledge, which he passed on to future generations. The six known copies of his map are in two versions, printed from two sets of wood blocks (c. 1639). A text at the top of one version explains why the world must be seen as a sphere, which demonstrates how these maps were meant to convince the Chinese public of European scientific findings
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