Necrosis

Necrosis is the death of body tissue. It occurs when too little blood flows to the tissue. This can be from injury, radiation, or chemicals. Necrosis cannot be reversed.

When large areas of tissue die due to a lack of blood supply, the condition is called gangrene.

Meningococcemia on the calves

Meningococcemia is a life-threatening infection that occurs when the meningococcus, Neisseria meningitidis, invades the blood stream. Bleeding into the skin (petechiae and purpura) may occur. The tissue in areas may die (become necrotic or gangrenous). If the person survives, the areas heal with scarring.

Meningococcemia on the leg

Meningococcemia is a life-threatening infection that occurs when the meningococcus, Neisseria meningitidis, invades the blood stream. There is usually bleeding into the skin (petechiae and purpura), and the tissue in these areas may die (become necrotic or gangrenous). If the patient survives, the areas heal with scarring. This picture demonstrates more hemorrhage and little tissue death.

Púrpura asociada con meningococcemia

La meningococcemia es una infección peligrosa que ocurre cuando la bacteria Neisseria meningitidis invade el torrente sanguíneo. Típicamente se presenta sangrado de la piel (petequias y púrpura) y el tejido puede morir (tornarse necrótico o gangrenoso). Si el paciente sobrevive, las áreas sanan dejando cicatrices.

Necrosis of the toes

Necrosis is death of a portion of tissue or an organ in the body. Tissue death occurs when there is not enough blood supplied to the area, whether from trauma, radiation, or chemicals. Once necrosis is confirmed, it is not reversible.