Relationship between fabella and posterolateral knee pain and common peroneal nerve injury / 中国骨伤

OBJECTIVE@#To analyze the incidence and characteristics of fabella in the Chinese population and its correlation with pain in the posterolateral region of the knee joint and common peroneal nerve palsy.@*METHODS@#Total 732 patients including 405 males(450 knees) and 327 females(383 knees) who underwent unilateral or bilateral knee MR imaging from September 2015 to July 2019 were retrospectively evaluated. The basic information of all patients was extracted from the hospital's his system. The patient's medical records were checked by telephone follow-up or his system, and the number of patients with posterolateral knee pain and common peroneal nerve paralysis were recorded.@*RESULTS@#The overall prevalence of fabella was 48.38%, 23.53% in men and 24.85% in women, there was no significant difference between them (@*CONCLUSION@#The prevalence of fabella us in Chinese population is 48.38%. There is no relationship between the incidence of gastrocnemius and gender, but the incidence of fabella is positively correlated with age, pain in the posterolateral region of the knee joint and the occurrence of common peroneal nerve symptoms.

The fabella, fabellofibular and short lateral ligaments: an anatomical study in Thais cadavers.

Objective: To study the existence of the fabella and related adjacent structures in the Thais cadavers. The dimension and cross-sectional area of the ligaments were estimated. Microscopic feature of the fabella was also verified. Method: One hundred and eighty-six Thais cadavers were used in this study. Incidence of the fabella was investigated. The adjacent fabellofibular and short lateral ligaments were also analyzed. Histological study of the fabella was carried out to demonstrate the character of the bone. Results: The fabella was found in 50.5% of total cadavers. In case of fabella, it exhibited a collagenous fibrous cord arising from the fabella to the styloid process of fibula, which was called fabellofibular ligament (6.18%). On the other hand, the short lateral ligament (8.33%) was found in the case with the absence of fabella extended from lateral capsule of knee joint to the styloid process of fibula. The histological feature of the fabella and dimensions of the ligaments were also presented. Conclusion: The study demonstrated the existence of the fabella in Thais. The morphological structure of the fabella, fabellofibular and short lateral ligaments which rarely mentioned was also disclosed.

Arthroscopic Treatment of Fabella Impingement Syndrome after Total Knee Arthroplasty: A Case Report / 대한정형외과학회잡지

Fabella impingement syndrome after total knee arthroplasty (TKA) is a rare condition. However, the location of the inserted prosthesis and the size of the fabella are considered major causative factors. Thus far, a conventional surgical excision of the impinged fabella is recommended treatment for the impingement. A 72-year-old woman was diagnosed with degenerative arthritis of the knee. She complained of fabella impingement due to an incompletely excised bony spur behind the posterolateral femoral prosthesis after TKA. The fabella and remaining bony spur were removed using an arthroscopic procedure. The impingement has not recurred and the range of motion (ROM) of the knee was improved after a 12 months follow-up. Arthroscopic surgery might be an alternative treatment for fabella impingement after TKA.

Fabella Impingement Syndrome: 1 Case

The fabella, which means little bean is a sesamoid bone located in the lteral head of the gastrocnemius muscle. It has been estimated from radiographic studies, that fabella presents in 11.5%-12.9% of adult knees, and bilaterally in more than 50% of the adult population. The salient features of the fabellar syndrome includes intermittent pain in the posterolateral region, accentuated by knee extension and localized tendemess caused by compression against the femoral condyle. We experienced a case of fabella impingement syndrome which includes symptom of intermittent pain in the posterolateral region, intermittent locking and limitation of knee motion, gd report with review of literatures where it has not ever been introduced.

Bilateral Fractured of the Fabella / 대한정형외과학회잡지

The fabella is the seasmoid bone occurring in about 10–30% of individuals and is located in the head of the lateral tendon of the Gastrocnemius muscle. Fracture of the fabella is a very rare condition. Since first reported by Jacob Sagel in 1932, only 5 cases of fabella fracture had been reported. However, there has been no bilateral case. We report a first case of bilateral fracture of the fabella with review of literature. This case was combined with rupture of anterior cruciate ligament and lateral collateral ligament on the right knee.