Congenital Absence of the Palmaris Longus Muscle: A Meta-Analysis Comparing Cadaveric and Function Studies

Publication date: Available online 26 August 2017
Source:Journal of Plastic, Reconstructive & Aesthetic Surgery
Author(s): Przemysław A. Pękala, Brandon Michael Henry, Jakub R. Pękala, Bendik Skinningsrud, Jerzy A. Walocha, Mariusz Bonczar, Krzysztof A. Tomaszewski
The aim of our paper was to provide comprehensive data on the prevalence of absence of palmaris longus muscle (PLM) and its anatomical characteristics, and conduct two separate meta-analyses comparing cadaveric and functional studies while identifying variation among different ethnic groups. An extensive search was conducted through the major electronic databases to identify eligible articles. Data extracted included prevalence of absence of palmaris longus muscle among subjects, ethnicity, laterality, side and gender. Our main findings revealed that the absence of palmaris longus muscle is more frequently reported in functional studies. We found that functional tests likely overestimated the absence of palmaris longus muscle, and recommend future studies to assess the validity of functional tests, and use an imaging assessment prior to excluding the use of a palmaris longus tendon graft in patients whom a function test identified as having an absent palmaris longus muscle.



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