Pseudomembrane
A pseudomembrane develops as a result of inflammation with the formation of an exudate that is rich in fibrin and cell debris (dead tissue cells or parts). In contrast to a membrane , the pseudomembrane does not have an ordered fine-tissue structure.
The cross-linking of the fibrin with the underlying, inflamed tissue (especially in diphtheria ) leads to the formation of firmly adhering coatings, and if it dries out, crusts form. Trying to remove these deposits will result in bleeding .
Occasionally a pseudomembranous-croupous inflammation is differentiated from the pseudomembranous-necrotizing inflammation. Diphtheria is mentioned as an example of the latter, but it is also referred to as croup .
Pseudomembranes arise from
- Diphtheria as a coating in pharyngeal diphtheria and nasal diphtheria ( rhinitis pseudomembranacea )
- pseudomembranous colitis
- Bacterial agitation
- Sublimate poisoning
- Inflammation of the mucous membranes during chemotherapy
- Conjunctivitis caused by adenoviruses (a rare complication)
- acute myeloid leukemia , as a rare manifestation in the cornea (cornea of the eye )
- pseudomembranous and necrotizing bronchiolitis
Footnotes
- ↑ E. Uchio: [New medical treatment for viral conjunctivitis]. In: Nippon Ganka Gakkai zasshi. Volume 109, Number 12, December 2005, pp. 962-984, ISSN 0029-0203 . PMID 16408491 . (Review).
- ↑ SK Kurup, H. Coleman, CC Chan: Corneal pseudomembrane from acute inflammatory response and fibrin formation to acute myeloid leukemic infiltrate. In: American journal of ophthalmology. Volume 139, Number 5, May 2005, pp. 921-923, ISSN 0002-9394 . doi : 10.1016 / j.ajo.2004.10.049 . PMID 15860306 .