A16 - Serous, catarrhal, haemorrhagic and ichorous inflammation

Question 1

What is serous inflammation?

Answer 1

It is the mildets form of inflammation, it consists of leakage or accumulation of fluid with low concentration of plasma proteins and low numbers of leukocytes

The response is often seen as transudate, often seen as a response to injury to the skin - Lesion appear as fluid filled blisters

Called SEROSITIS

Differentiated by localization according to tissue: Serous membrane, subvutis/submucosa, parenchymal organs

Question 2

What is serous inflammation on the serous membrane?

Answer 2

There is an inflammation on the membrane of the organs or cavities, such as the pleura, peritenoeum or pericardium

pleura = Pleuritis (Sourrounding the lungs)
Peritenoeum = Peritonitis (Surround the abdominal cavity)
Pericardium = Pericarditis (Surrounding the heart)

We see high amount of fluid in the lumen, haemorrhages or petetchia

Serous membrane = Outer lining of organs and cavities of thoracic cavity

Question 3

What is serous inflammation on the subcutis/submucosa?

Answer 3

Often seen as oedema in case of infectious diseases or abcesses. We can also see thickening and/or swelling

Innermost layer of the skin, closest layer to the muscles

Question 4

What is serous inflammation on the parenchymal organs?

Answer 4

Is typically seen in the lungs.
The alveolar ducts are filled with exuate, and there is no ventilation. The lungs feel heavy and more solid, the turbid flows on ht cut surface

Question 5

What is the outcome of serous inflammation?

Answer 5

Can be:

1. Independent feature, which makes for easy regeneration
2. Lead to introductory phase, which leads to more severe exudative inflammation
3. Develop a chronic serous inflammation

Question 6

What is catarrhal inflammation?

Answer 6

It is a type of acute exudative non-supportive inflammation occuring exclusively on the mucous memrbane, due to the presence of goblet cells which produce mucus

Question 7

What is haemorrhagic inflammation?

Answer 7

Basic inflammatory repsonse, wich the main feature being diapedesis of RBC

Question 8

Pathology of haemorrhagic inflammation

Answer 8

Can be seen as petechiae or larger haemorrhages, the content of the organs becomes reddish as it is mixed with the RBC

Question 9

What is ichorous inflammation?

Answer 9

It is the most severe inflammation.
It starts with a necrosis and a bacteria is involved which will decompose the tissue making smelly gasses.
Exudation is also seen, there will be large amount of fluid causing circulatory disturbnaces and large amounts of plasma leakage

The exudation is thinner than pus. It smells bad, is turbid and greenish

Question 10

Where can ichorous inflammation be seen?

Answer 10

Inside body cavities, on the mucous membrane or in the organs