Ters Palmaris Longus: Ön Kolda Benign Bir Şişlik Nedeni

ÖZET Normal bir anatomik yapı olarak palmaris longus kası, humerusun medial epikondilinden köken alır ve ön kol boyunca ilerleyerek distalde fleksör retinakulumu geçtikten sonra yüzeyel bir tendon olarak palmar aponevroza yapışır. Bu normal palmaris longus kas anatomisinin tam tersi olarak, ters palmaris longus proksimalde tendinöz bir kısma ve distalde kaslı bir kısma sahiptir. Ters palmaris longus nadir görülen bir kas anomalisidir. MRG'de, ters palmaris longus kasına ait kas öbeği fleksör karpi radialis tendonunun medialinde, ön kol volar yönünde tüm sekanslarda kas ile eş sinyalli olarak karşımıza çıkmaktadır. Bu anatomik varyantın ultrason ve MRg görünümüne aşina olmak ve görüntüleme bulgularını doğru bir şekilde tanımlamak, tedavi kararlarına rehberlik etmek ve tedavi sonuçlarını optimize etmek için esastır.

Anahtar Kelimeler:

Palmaris longus, kas, ters, ultrason, manyetik rezonans görüntüleme

Reverse Palmaris Longus: A Benign Cause of Swelling on The Forearm

ABSTRACT As a normal anatomic structure, the palmaris longus muscle originates from the medial epicondyle of the humerus and descends obliquely through the wrist. It has a flattened tendon distally and, after passing over the flexor retinaculum, inserts to the palmar aponeurosis superficially. As the exact opposite of this normal anatomy of palmaris longus muscle, reversed palmaris longus (RPL) has a tendinous part proximally and a muscular portion distally. RPL is a rare muscular abnormality. On MRI, RPL muscle belly is typically evident at the volar aspect of forearm, medial to the flexor carpi radialis tendon, which is of muscle signal on all sequences. Familiarity with the variant, ultrasound and MRI appearance of RPL and accurately describing relevant imaging findings is essential for guiding effective management decisions and optimizing treatment outcomes.

Keywords:

Palmaris longus, muscle, reversed, ultrasound, magnetic resonans imaging,

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