Chronic Suppurative Otitis Media or CSOM is a long standing infection of a part or whole of the middle ear cleft characterized by Ear discharge and a permanent Perforation. A perforation becomes permanent when it’s edges are covered by squamous epithelium and it does not heal spontaneously. A permanent perforation can be likened to an epithelium-lined fistulous track.
Word wise Meaning of CSOM:
- Chronic- Long standing
- Suppurative- Related with pus (containing or discharging pus)
- Otitis- Inflammation of ear
- Media- Middle ear
Types of CSOM
Clinically, it can be divided into two types:-
- Also called the safe or benign type.
- It involves anteroinferior part of middle ear cleft ,i.e, eustachian tube and mesotympanum.
- It is associated with central perforation.
- There is no risk of serious complication.
- Also called unsafe or dangerous type.
- It involves posterosuperior part of middle ear cleft, i.e, attic, antrum and mastoid.
- It is associated with an attic or marginal perforation.
- This disease is often associated with a bone-eroding process such as cholesteatoma, granulation or osteitis and risk of complication is very high.
Difference between Atticoantral and Tubotympanic CSOM
|Polyp||Pale||Red and fleshy|
|Audiogram||Mild to moderate conductive deafness||Conductive deafness or mixed deafness|