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
Hereâs what the most common awareness ribbon colors mean! Pink Ribbon: Pink is most commonly associated with breast cancer awareness, but itâs used for more than just that. What many people donât know is that pink ribbons are also symbols for respecting birth parents and for childhood cancer awareness. Yellow Ribbon: Yellow is commonly seen as a symbol to support our troops and to give us hope. However, it is also a symbol for POW/MIA (Prisoners of War, Missing in Action), suicide prevention, adoptive parents, spina bifida, sarcoma, missing children, bone cancer, craniofacial acceptance, and endometriosis.