The presence of an extensor digitorum brevis manus represents a variation of the normal anatomy of the fourth extensor compartment of the wrist. It usually presents as a swelling on the dorsum of the wrist and is often inaccurately diagnosed. An awareness of its existence and of its characteristic appearance on diagnostic imaging studies is the basis for diagnosis. Symptomatic cases require division of the extensor retinaculum or excision of the muscle, depending on subtype, while asymptomatic cases require no intervention.
TanST, SmithPJ. Anomalous extensor muscles of the hand: A review.J Hand Surg1999; 24(Suppl A):449–55.
2.
MestdaghH., BailleulJP, ViletteB., BocquetF., DepreuxR.. Organization of the extensor complex of the digits.Anat Clin1985; 7: 49–53.
3.
SchenckRR. Variations of the extensor tendons of the fingers: Surgical significance.J Bone Joint Surg1964; 46(Suppl A):103–10.
4.
LeslieDR. The tendons of the dorsum of the hand.Aust N Z J Surg1954; 23: 253–6.
5.
ZeissJ., Guilliam-HaidetL.. MR demonstration of anaomalous muscles about the volar aspect of the wrist and forearm.Clin Imaging1996; 20: 219–21.
6.
DostalGH, ListerGD, HutchinsonD., MoganJV, DavisPH. Extensor digitorum brevis manus associated with a dorsal wrist ganglion: A review of five cases.J Hand Surg1995; 20: 35–7.
7.
ChengJCY, HungLK. An unusual cause of wrist pain.J Hand Surg1986; 11(Suppl B):221–2.
8.
ConstantianMB, ZuelzerWA, TheogarajSD. The dorsal ganglion with anomalous muscles.J Hand Surg1979; 4: 84–5.
9.
SpinnerM., OlshanskyK.. The extensor indicis proprius syndrome: A clinical test.Plast Reconstr Surg1973; 51: 134–8.
10.
MacalisterA.. Note on muscular anomalies in human anatomy.Proc R Irish Acad1866; 9: 444–67.
11.
McGregorAl. A contribution to the morphology of the thumb.J Anat1926; 60: 259–73.
12.
StithJS, BrownePA. Extensor digitorum brevis manus: a case report and a review.Hand1979; 11: 217–223.
13.
DunnCAW, EvartsCM. The extensor digitorum brevis manus muscle: a case report.Clin Orthop1963; 28: 210–212.
14.
SouterWA. The extensor digitorum brevis manus.Br J Surg1966; 53: 821–823.
15.
WoodJ.. On some varieties in human myology.Proc R Soc Lond1864; 13: 229–303.
16.
CauldwellEW, AnsonBJ, WrightRR. The extensor indicis proprius muscle: a study of 263 consecutive specimens.Q Bull Northwest Univ Med School1943; 17: 267–269.
17.
AndersonMW, BenedettiP., WalterJ., SteinbergDR. MR appearance of the extensor digitorum manus brevis muscle: a pseudotumor of the hand.Am J Roentgenol1995; 164: 1477–1479.
18.
GamaC.. Extensor digitorum brevis manus: A report on 38 cases and a review of the literature.J Hand Surg1983; 8: 578–582.
19.
RossJA, TroyCA. The clinical significance of extensor digitorum brevis manus.J Bone Joint Surg1969; 51B: 473–478.
20.
OguraT., InoueH., TanabeG.. Anatomic and clinical studies of the extensor digitorum brevis manus.J Hand Surg1987; 12A: 100–107.
21.
JonesBV. An anomalous extensor indicis muscle.J Bone Joint Surg1959; 41B: 763–765.
22.
da GamaCC. Musculus extensor digitorum brevis manus.Int Surg1976; 61: 39–40.
23.
RitterWA, InglisAE. The extensor indicis proprius syndrome.J Bone Joint Surg [Am]1965: 51:645–648.
24.
EgawaT., HashimotoK. An anomalous exensor indicis muscle A case report.Bull Hosp J Dis Orthop Inst1966; 27: 116–119.
25.
ReefTC, BrestinSG. The extensor digitorum brevis manus.Hand1972; 4: 263–264.
26.
HayashiH., KojimaT., FukumotoK.. The fourth-compartment syndrome; its anatomical basis and clinical cases.Handchir Mikrochir Plast Chir1999; 31: 61–65.
