Files stored in the UPD format are more commonly known as program update information files. These .upd files are text documents, and its content can be viewed by any text editing or word processing application. Users of Microsoft Windows-based systems can use the Microsoft Notepad application to open and edit these .upd text documents.
Croup (acute laryngotracheobronchitis) on X-ray with steeple sign. Croup, also called acute laryngotracheobronchitis is caused by viral infection of the upper airway usually parainfluenza virus or respiratory syncytial virus (RSV).
Central retinal vein occlusion may occur. If the tumor is next to the optic nerve, growth can compress the nerve and cause gradual loss of vision and unilateral proptosis. Dyschromatopsia may occur. Growth can also cause compressive vascular problems like central retinal vein occlusion. Lastly, growth also causes the tumor to exceed its blood supply.