Abstract
Variation in the extensor muscles of the hand is common. These anatomic deviations are rarely symptomatic. We report a unique case of an anomalous extensor indicis proprius causing a painful snapping wrist. Intraoperative examination revealed a disproportionately large muscle belly under the extensor retinaculum causing subluxation of the ring and small extensor tendons creating a painful snapping phenomenon. Following excision, the subluxation and pain resolved.
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References
1.
Cauldwell
EW
Anson
BJ
Wright
RR
. The extensor indicis proprius muscle: a study of 263 consecutive specimens . Q Bull Northwest Univ Med Sch 1943 ;17 :267 –9 .
2.
Gonzalez
M
Weinzweig
N
Kay
T
Grindel
S
. Anatomy of the extensor tendons to the index finger . J Hand Surg 1996 ;21A :988 –91 .
3.
Komiyama
M
New
TM
Toyota
N
Shimada
T
. Variations of the extensor indicis muscle and tendon . J Hand Surg Br 1999 ;24B (5 ):575 –8 .
4.
Lemon
R
Engber
W
. Trigger wrist: a case report . J Hand Surg 1985 ;10A (1 ):61 –3 .
5.
Patel
M
Moradia
V
Bassini
L
Lei
B
. Extensor indicis proprius syndrome: a case report . J Hand Surg 1996 ;21A (5 ):914 –5 .
6.
Reagan
DS
Linscheid
R
Dobyns
JH
. Lunotriquetral sprains . J Hand Surg 1984 ;9 :502 –14 .
7.
Ritter
M
Inglis
A
. The extensor indicis proprius syndrome . J Bone Jt Surg 1969 ;51-A (8 ):1645 –48 .
8.
Spinner
M
Olshansky
K
. Extensor indicis proprius syndrome: a clinical test . Plast Reconstr Surg 1973 ;51 :134 –8 .
9.
Tan
S
Smith
P
. Anomalous extensor muscles of the hand: a review . J Hand Surg 1999 ;24A :449 –55 .
10.
Watson
HD
Ashmead
D
IV
Makhlouf
MV
. Examination of the scaphoid . J Hand Surg 1988 ;13 :657 –60 .