What does Hepatisation mean in the context of pneumonia lung pathology?
Pulmonary hepatisation refers to the pathologic alteration of lung tissue such that it resembles liver tissue. The term originates as a classic descriptor in surgical pathology, used to describe intermediate stages of lobar pneumonic consolidation. In imaging, the term is similarly used to describe lung consolidation.
What is the stage before pneumonia called?
Stage 1: Congestion. Stage 2: Red hepatization. Stage 3: Grey hepatization. Stage 4: Resolution.
What is the final stage of pneumonia?
The fourth and final stage, called resolution (day 7-10), is characterized by resorption of inflammatory fluids and cellular debris and restoration of the normal airways and air-sacs. Residual inflammation may lead to chronic narrowing of airways and scar tissue (pleural adhesions).
What is Red hepatization in pneumonia?
The second stage of pneumonia is red hepatization, which refers to the body’s initial immune response to the fluid in the lungs. The body sends red blood cells and immune cells to the area to help combat the pneumonia infection.
How long does it take for Stage 2 hepatization to occur?
Stage 2 (red hepatization) occurs after 48 to 72 hours and lasts for about 2 to 4 days. The affected lung becomes more dry, granular and airless and resembles the consistency of liver. Red cells, white cells, bacteria and cellular debris can clog the lung airways.
What are the signs and symptoms of avascular stage of hepatization?
This stage will occur two to three days after red hepatization and is an avascular stage. The lungs will appear to be a grayish brown or yellow color because of the disintegration of red cells. Your lungs will also appear to be paler and drier than usual. There will be a persistence of fibrin exudate during this stage.
What does Stage 3 hepatization look like?
Stage 3 (grey hepatization) occurs on day 4 to 6 and continues for 4 to 8 days. The lung looks grey or yellow in color but still has the consistency of liver. Fibrin, hemosiderin and red blood cells break down and lead to a more fluid-like exudate.