Prevalence of Absence of Palmaris Longus tendon

Introduction

The palmaris longus (PL) tendon is a muscle in the forearm that is often used in tendon graft surgeries. Its absence varies significantly across different populations and ethnic groups. Understanding the prevalence of its absence can have clinical implications, particularly in surgical planning and anatomical studies.

Key Insights

General Prevalence and Ethnic Variations:
- The absence of the PL tendon varies widely across different populations, ranging from 2.2% to 63.9% .
- Asian, Black, and Native American populations generally show a lower prevalence of PL absence compared to Caucasian populations .
Specific Population Studies:
- Chinese Population: Overall absence of 4.6%, with no significant difference between sexes or body sides.
- Bahraini Population: High prevalence of 36.8%, with bilateral absence more common than unilateral, and a higher absence rate in females and on the left side.
- Iranian Population: Overall absence of 13.2%, with no significant difference between sexes or body sides.
- Turkish Population: Overall absence of 26.6%, more common in women, and bilateral absence more frequent than unilateral.
- North American Caucasians: Overall absence of 5.5%, lower than earlier reports, with no significant sex difference.
- East African Population: Overall absence of 4.4%, with a higher likelihood of absence in the non-dominant hand.
- Indian Population: Unilateral absence of 16.9% and bilateral absence of 3.3%, with no significant difference between sexes or body sides.
Hand Dominance and Laterality:
- Right-handed individuals tend to have a higher absence rate on the left side, while left-handed individuals show a higher absence rate on the right side.
- Unilateral absence is more common on the non-dominant hand .
Gender Differences:
- Several studies report a higher prevalence of PL absence in females compared to males .
- Some studies found no significant gender differences .

Conclusion

The prevalence of the absence of the palmaris longus tendon varies significantly across different ethnic groups and populations. Generally, Asian, Black, and Native American populations show lower absence rates compared to Caucasians. The absence is often more common in females and tends to be more frequent on the non-dominant hand. These variations highlight the importance of considering ethnic and demographic factors in clinical and anatomical studies involving the palmaris longus tendon.

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Prevalence of Absence of Palmaris Longus tendon

Summary

Introduction

Key Insights

Conclusion

Sources and full results

The Prevalence of Absence of the Palmaris Longus – A Study in a Chinese Population and a Review of the Literature

The prevalence of palmaris longus absence in Chinese populations is 4.6%, with a higher prevalence in Caucasian populations, highlighting the need for a more accurate standard for all ethnic groups.

The prevalence of absence of the palmaris longus muscle in the Bahraini population

The palmaris longus muscle is absent in 36.8% of Bahraini subjects, with bilateral absence (19%) being more common than unilateral absence (17.9%), and is more common in females and on the left side of the body.

The Prevalence of Absence of the Palmaris Longus Muscle Tendon in the North of Iran: A Comparative Study

The presence of the palmaris longus muscle tendon is significantly higher than its absence in the Guilan population, with no significant difference between men and women and a higher prevalence of left-absent palmaris longus.

The prevalence of absence of the palmaris longus: a study in Turkish population

The prevalence of palmaris longus absence in Turkish population is 26.6%, with women more likely to have it and bilateral absence more common than unilateral absence.

Frequency of the Palmaris Longus Tendon in North American Caucasians

The palmaris longus tendon is absent in North American Caucasians at a lower frequency than previously reported, with a prevalence of 5.5% in one extremity and 2.5% with bilateral absence.

Prevalence of the palmaris longus in relation to the hand dominance

Right-sided absence of palmaris longus tendon is more common in left-handed individuals, while left-sided absence is more common in right-handed individuals, with unilateral tendon absence more common on the non-dominant hand.

Frequency of Agenesis Palmaris Longus through Clinical Examination - An East African Study

The absence of the Palmaris longus muscle is common in East Africa, with a higher prevalence in non-dominant hands, possibly due to higher manual labor and more use of the right hand in activities.

Absence of the palmaris longus muscle: a population study.

Unilateral and bilateral absence of palmaris longus muscle is more common in males, but not statistically significant.

Absence of the palmaris longus tendon in Indian population

The prevalence of unilateral absence of the palmaris longus tendon in Indian population is comparable to western population, but bilateral absence is significantly less, and in these cases, the flexor digitorum superficialis in the little finger is weak, especially in males.

Prevalence of the palmaris longus through clinical evaluation

The palmaris longus tendon is relatively common to be absent, with more pronounced loss on the left side in women, and a higher incidence in middle-aged and young individuals.

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