The sequelae of chronic middle ear infections are described through several descriptors.
Descriptive terms:
(1) ear discharge (otorrhea)
(2) eardrum perforation
(3) eardrum calcification
(4) aditus ad antrum blockage
|
Parameter
|
Finding
|
Descriptive Term
|
|
ear discharge
|
present
|
wet
|
|
|
no discharge for 3 months
|
dry
|
|
eardrum perforation
|
sum of areas in all 4 quadrants
|
total area
|
|
|
does not involve the edge (annulus) of the eardrum
|
central
|
|
|
involves the annulus
|
marginal
|
|
calcification
|
affects both superior quadrants, with or without inferior quadrants
|
Type I
|
|
|
affects either one of the superior quadrants, with or without inferior quadrants
|
Type II
|
|
aditus ad antrum
|
no soft tissue density in CT scan including the aditus
|
no blockage
|
|
|
soft tissue density in CT scan including the aditus
|
blockage
|
