بررسي ارتباط وجودي تاندون هاي پالماريس لانگوس و فلكسور سطحي انگشت پنجم با سندروم كانال مچي

The Role of Presence IAbsence of Palmaris Longus and Fifth Flexor Digitorum SuperfIscialis Tendons in Carpal Tunnel Syndrome

Background & Aims: Etiologically the causing factor of carpal tunnel syndrome is not clear and multiple contributing factors such as the presence or absence of Palmaris longus tendon have been cited. The aim of the present studywas to compare patients with carpal tunnel syndrome and healthy individuals in regard to the absence and presence of Palmaris longusand fifth ftexor digitarum superficialis tendons. Methods: This prospective studywas performed on 60 diseased and 180 normal hands. Presence or absence ofeachtendonwas determined carefully by the sameexaminerin both groups. Data were compared by Chisquare test. Results: The relationship between carpal tunnel syndrome and the absence of Palmaris longus tendon and fifth flexor digitorum superficialis was significant (fʹoʹQ.04l & fʹoʹQ.OS respectively). Carpaltunnel syndrome groupcompared to the control group had higher rate of the absence of bothtendons in one hand (p=0.017) and lowerrate of the presence of both tendons in one hand (fʹoʹQ.OOS). By considering only the hands with Palmaris longus tendon, there were more cases of absence of fifth flexor digitorum superficialis in carpal tunnel syndrome group(P=0.048), but by considering only the handswith fifth flexor superficialis, therewas no significant difference betweenthe two groups in regard to the presence of Palmaris longus tendone. Conclusion: It seems that the absence of Palmaris longus tendon and fifth superficial flexor each aloneand in combination is a risk factor for development of carpal tunnel syndrome. Probably the absence of superficial flexor is a greater risk factor than the absence ofPalmaris longus.