[Click phenomenon in acquired Jaensch-Brown syndrome and trigger finger/thumb: the Notta syndrome]. / "Klick"-Phänomen beim erworbenen Jaensch-Brown-Syndrom und schnellenden Finger/Daumen: dem Notta-Syndrom.
Ophthalmologie
; 121(8): 631-643, 2024 Aug.
Article
in De
| MEDLINE
| ID: mdl-38953924
ABSTRACT
CLINICAL FEATURES The click phenomenon occurs when an acquired mechanical restriction of the elevation in adduction of the eye or of the extension of the finger/thumb, is forcefully overcome. The common cause is a nodule either of the superior oblique tendon posterior to the trochlea in the case of a Jaensch-Brown syndrome or of the digital flexor tendon anterior to the A1 annular pulley in the case of a trigger finger. Both locations share similar anatomical conditions for the development of the nodule and the pathomechanism of the click. RESULTS:
From these identical findings in the eye and the hand in small children it can be assumed that the results from the studies of the hand in newborns and infants with a trigger thumb/finger are also applicable to the situation of the eye. 1. This motility disorder is not congenital. This is most likely due to an incomplete development at the time of birth of the sliding factors needed for a free passage of the tendon through the trochlea and the A1 annular pulley. 2. A distinction must be made between stages 0-3 stage 0â¯= no more restriction of the motility and no click phenomenon; stage 1â¯= forced active extension/elevation possible; stage 2â¯= only passive extension/elevation, each with a click phenomenon; stage 3â¯= no extension/elevation possible and no click phenomenon. 3. In most cases in early childhood there is a spontaneous complete recovery (75% after 6-7 years). In the eye this spontaneous course can only limitedly be shortened with motility exercises in combination with segmental occlusion.CONCLUSION:
The click phenomenon is a symptom of stages 1 and 2 of an acquired mechanical restriction of the elevation in adduction of the eye or the extension of the finger/thumb. It should not be called a syndrome.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trigger Finger Disorder
Limits:
Child
/
Humans
/
Infant
/
Newborn
Language:
De
Journal:
Ophthalmologie
Year:
2024
Document type:
Article