Disc lesions of the lumbar spine are more common than those of the cervical spine and disc lesions of the thoracic spine are rare. The term sciatica is used for the pain, tingling and numbness that arise due to nerve root entrapment in the lumbosacral spine.
The only way you can do this is to make your regular sugar into a syrup and whip it into a creamy type frosting such as 7-minute frosting made with egg whites. You need to use a recipe that calls specifically for granulated sugar and not for 10x, confectioner's or powdered sugar.
Technically ganache can be a frosting. On the other hand, frosting can be something that is used to cover cakes or cupcakes that mat not be derived from cream or chocolate. There are many different types of frostings and can be based on butter, cream cheese, cream or shortening with either 10x sugar or cooked sugar / liquid . Some types are whipped cream frosting, Swiss, French or Italian meringue buttercream, 7 minute frosting and American buttercream (mainly butter, confectioners sugar and flavoring).