Pathology of MALT/appendix


Appendix explanatory video

Palatine tonsil get easily affected causing tonsilitis or a more serious variety of peritonsillar abscess (Quinsy). Also pharyngeal tonsil may become inflammed in children causing adenoids.

Appendicitis is a good example of what can go wrong with the lymphatic system. When the lymphatic nodules swell in the mucosa of appendix, they help to block the appendicular lumen leading to stasis of fluid and overgrowth of bacteria.

This acute or subacute (or in deed chronic) infection of the vermiform appendix is in most cases triggered off by blockage of its very small lumen by fecolith, tumor, worms or calculus, leading to stasis and bacterial overgrowth after ischemia. It involves an acute phase neutrophil exudate and congestion of subserosal vessels. Its chronic state may lead to abscess formation.

Links

Histopathology    Histology

Appendicitis
Acute suppurative appendicits 

Pathology     Anatomy

Acute appendicitis

Suppurative appendicitis

Appendicolith

Perforated appendix


Appendix microscope          Double click for full screen

 

    
Appendicitis with blocked appendicular lumen

 

 

 

 

 

 

 

 

 

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