Low lying peroneus brevis muscle belly
Low lying peroneus brevis muscle belly (LLPB) is a rare congenital anomaly that makes the tendon more prone to tendon tear and subluxation 1,2. This condition is defined by the extension of the muscle belly to the level of the fibular groove.
Peroneus quartus muscle - as an accessory peroneal muscle - should be distinguished from LLPB. Peroneus quartus forms a distinct myotendinous structure in the peroneal compartment with variable lateral insertion.
- 1. Unlu MC, Bilgili M, Akgun I, Kaynak G, Ogut T, Uzun I. Abnormal proximal musculotendinous junction of the peroneus brevis muscle as a cause of peroneus brevis tendon tears: a cadaveric study. (2010) The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons. 49 (6): 537-40. doi:10.1053/j.jfas.2010.09.001 - Pubmed
- 2. Mirmiran R, Squire C, Wassell D. Prevalence and Role of a Low-Lying Peroneus Brevis Muscle Belly in Patients With Peroneal Tendon Pathologic Features: A Potential Source of Tendon Subluxation. (2015) The Journal of foot and ankle surgery : official publication of the American College of Foot and Ankle Surgeons. 54 (5): 872-5. doi:10.1053/j.jfas.2015.02.012 - Pubmed