Limitation of Knee Flexion by a Fibrotic Band of a Fifth Component of the Quadriceps Muscle in a Child

Abstract

To our knowledge, this is the first reported case of a fibrotic muscle band in the anatomic position of a previously described fifth accessory component of the quadriceps muscle that caused limited knee flexion in a child.

Not an arthritis, but a fibrotic band of the quadriceps muscle: A case report of unilateral restricted knee flexion in an adolescent

“…In most of the cases reported in the literature regarding the fibrotic band in the quadriceps, the localization of the fibrotic band is the tensor vastus intermedius or accessory quinticeps femoris, a newly defined muscle between the vastus intermedius and the vastus lateralis. 1,3,7,8,15 However, in our case, the fibrotic band localization was completely different, which was in the vastus lateralis muscle. The surgical method for fibrotic bands involves the direct excision of the band structure.…”

“…Nevertheless, the congenital fibrotic band has been less defined. 1,3,7,8 Fibrotic bands and fibrosis of the quadriceps are very similar in microscopy. Yet, these are two distinct conditions in terms of macroscopy that can be observed during surgery.…”

“…Although quadriceps muscle fibrosis is relatively common, fibrotic bands associated with the components of quadriceps are extremely rare, with a number of reports in the literature. 1,3,7,8 In this current article, an adolescent case with a fibrotic band of the vastus lateralis muscle will be presented and discussed along with the literature.…”

“…Dear Editor, Fibrotic bands in the musculoskeletal system can lead to several clinical pictures, such as limited range of motion (ROM), torticollis, vascular compression syndromes, nerve entrapment (e.g., protanor teres syndrome), and relative leg-length discrepancy. [1][2][3][4][5][6] Fibrotic band in the quadriceps muscle group is a very challenging clinical condition. The quadriceps femoris muscle is a group of knee extensors, including the rectus femoris, the vastus lateralis, the vastus medialis, and the vastus intermedius.…”

Quadriceps femoris muscle: anatomical variations, population frequencies and clinical implications

“…Furthermore, it should be noted that many of the studies made have a high risk of bias [29]. The clinical implications related to the existence of additional heads in the quadriceps femoris are evident as previously discussed in the results section [17,23,30,38] and certain lesions have been erroneously attributed to the vastus intermedius or lateralis instead of the tensor vastus intermedius when is present [20].…”