Cranial nerve disorder	Disorder of oculomotor system	Finding of head and neck region	Peripheral nerve disease	Trochlear nerve disorder
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Fourth nerve palsy (disorder)
	Fourth nerve palsy
	IV nerve palsy Fourth cranial nerve palsy Trochlear nerve weakness Fourth cranial nerve paralysis Trochlear nerve palsy 4th nerve palsy Superior oblique palsy Trochlear nerve paralysis Fourth cranial nerve paresis
	uitval van nervus trochlearis
	uitval van vierde hersenzenuw verlamming van craniale zenuw IV

Id	20610004
Status	Primitive

Finding site

Trochlear nerve structure

Dutch optometric diagnoses simple reference set

DHD Diagnosis thesaurus reference set

ICD-10 complex map reference set

Target	H49.1
Rule	TRUE
Advice	ALWAYS H49.1
Correlation	SNOMED CT source code to target map code correlation not specified

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Acquired trochlear nerve palsy

Acute trochlear nerve palsy

Bilateral superior oblique palsy

Chronic trochlear nerve palsy1

Congenital trochlear nerve palsy1