What is avascular necrosis? Avascular necrosis is a disease that results from the temporary or permanent loss of blood supply to the bone. When blood supply is cut off, the bone tissue dies and the bone collapses. If avascular necrosis happens near a joint, the joint surface may collapse. This condition may happen in any bone.
1 For fallen police officers. 2  In the US, a blue ribbon is a symbol for remembrance for fallen members of local police services. 3  The ribbons are displayed by the survivors of fallen police officers and are very symbolic of the COPS organization, Concerns Of Police Survivors. A blue ribbon is also the ribbon used for awareness for the disease of neurofibromatosis. 2  A blue ribbon is also the ribbon used for awareness for the autoimmune disease of Sjoegren'sjÃ¶gren s. 3  Syndrome-anti smoke.  campaigns
Lavender Ribbon-Lavender awareness ribbons are associated with cancer and epilepsy. Light Blue Ribbon-Light blue is the ribbon to support Prostate Cancer, Trisomy 18, Addison's Disease, Lymphedema and Behcet's Disease. Light Green Ribbon-The Light Green ribbon symbolizes support for STD and HPV.