9C81.1 Fourth nerve palsy
International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2025-01
inclusions
- isolated trochlear nerve palsy
 
postcoordination
Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.
Laterality - only one may be selected
Course - only one may be selected
synonyms
- Fourth nerve palsy
 - 4th nerve palsy
 - fourth cranial nerve paralysis
 - fourth cranial nerve paresis
 - superior oblique palsy
 - trochlear nerve palsy
 - trochlear nerve paralysis
 - trochlear nerve weakness
 - isolated trochlear nerve palsy
 - atrophy of fourth cranial nerve
 - atrophy of trochlear nerve
 - Congenital trochlear nerve palsy
 - Congenital superior oblique palsy
 - Acquired trochlear nerve palsy
 - Acute trochlear nerve palsy
 - Chronic trochlear nerve palsy
 - Chronic trochlear nerve palsy, spread of comitance
 - Neuritis of fourth cranial nerve
 - inflammation of trochlear nerve
 - neuritis of trochlear nerve
 
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