Learn more about x-rays, a quick and painless, non-invasive diagnostic tool used to detect and stage cancerous tumors. the information on this halaman was reviewed and approved by maurie markman, md, president, medicine & science at ctca. this. A characteristic feature on ct sinuses is sclerotic thickened bone (hyperostosis) involving the sinus wall from a prolonged mucoperiosteal reaction. intrasinus calcificationmay be present. the presence of opacification is not a good discriminator from an acute sinus infection. there are five main patterns of chronic inflammatory disease that classify the disease into distinct anatomical/pathological groups and are dependent on the drainage pathways affected. this classification helps the surgeon to select the type of surgery needed 12: 1. ostiomeatal complex pattern: maxillary sinus, anterior ethmoid air cells, and frontal sinuses are affected due to obstruction of the ostiomeatal complex 2. infundibular pattern: isolated obstruction to th...