Anomalous muscles in the hand and wrist—Report of three cases

ABERRANT ABDUCTOR DIGITI MINIMI MUSCLE FOUND DURING OPEN SURGICAL DECOMPRESSION OF THE CARPAL TUNNEL: CASE REPORT. Músculo abductor digiti minimi aberrante hallado durante una cirugía abierta descompresiva del tunel carpiano: reporte de caso

“…In livings, most of the aberrant muscles are usually asymptomatic or may occasionally simulate a soft-tissue tumor (Simodynes and Cochran, 1981). Other variant hypothenar muscles may cause ulnar nerve and artery compression at the wrist, as described in some clinical reports (Jeffery, 1971;Simodynes and Cochran, 1981;Pribyl and Moneim, 1994;Spinner et al, 1996). Herein, we present an unusual case of an aberrant hypothenar muscle and emphasize its potential clinical importance.…”

“…The variations of the hypothenar muscles are numerous, many of them described during anatomical rather than surgical dissection (Macalister, 1875;Le Double, 1897;Saadeh and Bergman, 1988;Jeffery, 1971;Pribyl and Moneim, 1994;Spinner et al, 1996;Georgiev and Jelev, 2009;Georgiev and Jelev, 2011). In livings, most of the aberrant muscles are usually asymptomatic or may occasionally simulate a soft-tissue tumor (Simodynes and Cochran, 1981). Other variant hypothenar muscles may cause ulnar nerve and artery compression at the wrist, as described in some clinical reports (Jeffery, 1971;Simodynes and Cochran, 1981;Pribyl and Moneim, 1994;Spinner et al, 1996).…”

The Flexor Carpi Radialis Brevis Muscle: An Anomalous Flexor of the Wrist and Hand. A Case Report

“…Although anomalous forearm and wrist flexor muscles have been encountered during surgical dissection [2][3][4] and magnetic resonance imaging evaluation of normal wrists, 5,6 aberrations of the FCR are rare, having been observed only in cadaveric specimens and not previously described in a clinical context. 7-13 The short radiocarpal flexor, or flexor carpi radialis brevis (FCRB), has been previously classified based on its variations of insertion or origin 7 : (1) radiopalmar type, (2) radiocarpal type, (3) radiometacarpal type, and (4) mixed.…”

Variant triple origin of the flexor digiti minimi brevis (manus) muscle in relation to ulnar nerve and artery compression at the wrist

“…However, other variant hypothenar muscles may cause ulnar nerve and artery compression at the wrist as suggested in many clinical reports (Jeffery, 1971;Simodynes and Cochran, 1981;Pribyl and Moneim, 1994;Spinner et al, 1996).…”

“…A review of the pertinent literature reveals that the variant flexor digiti minimi brevis with triple origin, presented in this report, is a unique anatomical variation. Because the intermediate portion of this muscle crosses over the ulnar artery and nerve in the canal of Guyon, the variant flexor digiti minimi brevis may result in ulnar nerve compression and ulnar artery thrombosis (Jeffery, 1971;Simodynes and Cochran, 1981;Pribyl and Moneim, 1994;Spinner et al, 1996). …”