Clinical Importance of the Extensor Digitorum Brevis Manus Muscle:Case Report

Abstract

The extensor digitorum brevis manus muscle is a rare accessory hand muscle. It presents as a swelling on the dorsum of the hand and is often misdiagnosed as a ganglion. In symptomatic cases the treatment is division of the extensor retinaculum or ablation of the muscle.

Flexor Carpi Radialis Brevis Muscle Presenting as a Painful Forearm Mass: Case Report

“…This treatment is identical to that for other anomalous muscles of the hand that can cause a painful mass, such as the extensor digitorum brevis manus. [13][14][15] The differential diagnosis for a painful, palpable mass on the volar radial wrist includes ganglions, lipomas, tumors, or other soft tissue masses secondary to infectious and rheumatologic conditions. This paper serves as a reminder that anomalous muscles should be included in the differential diagnosis.…”

Extensor digitorum brevis manus: Anatomical, radiological and clinical relevance: A Review

“…The association of the absence of the extensor indicis and the presence of an EDBM for the index finger has been reported previously and was observed once in the present study (Calori, 1867;Wood, 1868;Walsham, 1880;Testut, 1884;Cauldwell et al, 1943;Dunn and Evarts, 1963;Egawa and Hashimoto, 1966;Kaneff, 1970;De Santolo and Mansat, 1971;Varian and Pennington, 1977;Adler et al, 1982;Murakami and Todani, 1982;Gahhos and Ariyan, 1983;Gama, 1983;Lehrberger and Tizian, 1984;Yoshida et al, 1984;Ogura et al, 1987;Shaw and Manders, 1988;Voigt and Breyer, 1989;Yoshida, 1990;Døssing, 1994;El-Badawi et al, 1995;Patel et al, 1996). Our analysis of the literature showed that in 295 dissections of EDBM (93 to the index finger) the extensor indicis was reported to be absent in 47 (15.9% of the total EDBM and 50.5% of the EDBM to the index finger).…”

“…The EDBM is one of these muscles and was first reported by Albinus in 1734. Since then, a large number of reports, many based on casual findings have been published, amounting to 295 cases (Banchi, 1906;Manno, 1907;Sauser, 1935;Bhadkamkar and Mysorekar, 1960;Dunn and Evarts, 1963;Bingold, 1964;Souter, 1966;Glasgow, 1967;Ross and Troy, 1969;Binns, 1972;Hart, 1972;Riordan and Stokes, 1973;Reef and Brestin, 1975;Pitt, 1976;Lucas, 1979;Stith and Browne, 1979;Wise and Weeks, 1981;Murakami and Todani, 1982;Gahhos and Ariyan, 1983;Lehrberger and Tizian, 1984;Ishizuki et al, 1986;Gebuhr and Klareskov, 1987;Hoffman and Ellison, 1987;Haninec and Tichý , 1988;Khaledpour and Schindelmeiser, 1993;Døssing, 1994;Dostal et al, 1995;Fakih et al, 1997).…”

“…A lack of awareness of its existence, however, and the fact that it may appear as a painful mass with repeated exercise, has resulted in it being frequently misdiagnosed as a dorsal wrist ganglion, exostosis, tendon sheath cyst, tenosynovitis of extensor tendons, hemangioma, rheumatoid tenosynovitis or benign soft tissue tumor. Thus, the muscle has often been revealed during surgical procedures to manage these disorders (Jones, 1959;Dunn and Evarts, 1963;Bingold, 1964;Gagnon and Lavigne, 1964;Egawa and Hashimoto, 1966;Fortier et al, 1966;Peeling, 1966;Souter, 1966;Glasgow, 1967;Ross and Troy, 1969;Binns, 1972;Hart, 1972;Denham and Dingley, 1972;Koussouris, 1973;Riordan and Stokes, 1973;Reef and Brestin, 1975;Gama, 1976;Pitt, 1976;Lucas, 1979;Stith and Browne, 1979;Cantero, 1981;Verdan, 1981;Wise and Weeks, 1981;Murakami and Todani, 1982;Towfigh and Klaes, 1982;Gahhos and Ariyan, 1983;Lehrberger and Tizian, 1984;Della Vella and De Giovannini, 1985;Ishizuki et al, 1986;Gebuhr and Klareskov, 1987;Hoffman and Ellison, 1987;Shaw and Manders, 1988;Kuschner et al, 1989;Patel et al, 1989;Voigt and Breyer, 1989;Døssing, 1994;…”

Extensor digitorum brevis manus muscle in a patient with neurofibromatosis type 1

“…Its anatomy has been classified into three types according to their insertion and relationship with the extensor indicis propius (8). Its clinical importance in dorsiflexion of the wrist is only marginal (2). Muscle hypertrophy secondary to the increased use of the dominant hand may be a factor in producing the symptoms of this anomaly (9).…”