Prevalence of the fabella and its general characteristics in Turkish population with magnetic resonance imaging

Ünlütürk, Özge; Duran, Semra; Teke, Hacer Yaşar

doi:10.1007/s00276-021-02817-3

Cited by 2 publications

(5 citation statements)

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“…However, Zeng et al found that 8/25 excised fabellae classified as cartilaginous were visible radiologically [ 4 ]. Conversely, MRI-based studies are acknowledged to be capable of visualizing cartilaginous fabellae, and, therefore, generally include them in their prevalence rates without classification [ 26 , 28 , 29 ]. Yet Chew et al, who performed both radiographs and MR imaging of knees, observed no cartilaginous fabellae in their sample [ 22 ].…”

Section: Discussionmentioning

confidence: 99%

“…Multiple factors beyond variability in tissue density likely contribute to the heterogeneity in reported fabella prevalence rates. There may be some variation due to ethnicity, as several authors have observed that fabellae seem to be more common in Asian populations [ 18 , 19 , 21 , 22 , 24 , 28 ]. It’s been speculated that increased ossification in these groups could be driven by lifestyle differences [ 22 ].…”

Section: Discussionmentioning

confidence: 99%

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X-ray Imaging Versus Anatomical Dissection for Identification of the Fabella

Bauman,

Alzahabi

2024

Cureus

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Introduction: Reported prevalence rates of the fabella sesamoid bone vary widely, particularly between studies based on either X-ray imaging or anatomical dissection approaches. The purpose of this study was to directly compare these two methodologies in their detection of fabellae and investigate whether variability in the density of fabellae could explain any discrepancies. Methods: Fifty cadaveric knee segments were examined for the presence of a fabella by both X-ray imaging and anatomical dissection. The relative density of each excised fabella specimen was then quantified using a separate set of radiographs. Results: Fabellae were detected in 40% of the sample knees via a manual dissection approach but in just 12% of those same specimens using X-ray imaging. Relative density measurements confirmed that fabellae identifiable only via dissection were significantly less dense than fabellae visible in whole knee radiographs but denser than the surrounding tissue. Conclusion: Radiology cannot reliably detect cartilaginous or incompletely ossified fabellae, which were found in 28% of the study population. Clinicians should consider the potential occurrence of a fabella when diagnosing posterolateral knee pain, even if it may not be visible via X-ray.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

X-ray Imaging Versus Anatomical Dissection for Identification of the Fabella

Bauman,

Alzahabi

2024

Cureus

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“…Some researchers have used radiographs in detecting the presence of fabella, while some others have utilized MRI. [8,13] The prevalence of fabella has been reported to be higher in cadaveric studies than in radiological studies. [21][22][23] Of note, no previous study has examined such a large population of knee CTs as ours.…”

Section: Discussionmentioning

confidence: 99%

“…[ 20 ] We, on the other hand, conducted our study using CT examinations, which best showed the bone structure. Unluturk et al’s[ 13 ] study in which 1,000 patients were examined by MRI, the prevalence was 15.5%, and no sex difference was found. In our study, although no sex difference was found, the frequency of fabella increased in older females in the regression model including age and sex.…”

Section: Discussionmentioning

confidence: 99%

“…[5,12] Several studies investigating the prevalence of the fabella in the general population have attempted to identify its prevalence using surgical/section reports, radiographs, and computed tomography (CT) and magnetic resonance imaging (MRI) scans. [8,11,13] The fabella occurs in 10 to 30% of the population and is mostly bilateral. [8,12] The fabella is a sesamoid bone, and sesamoid bones usually act as amplifiers for the moment arm.…”

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The prevalence of fabella and its relationship with the lateral posterior condylar offset and lateral posterior tibial slope values

et al. 2022

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The posterolateral corner (PLC) consists of many different structures that act as static and dynamic stabilizers of the knee during motion. [1] The posterolateral corner (PLC) consists of many different structures that act as static and dynamic stabilizers of the knee during motion. [2] The anatomy and function of PLC are still poorly understood. [3] The lateral posterior condylar offset (LPCO) and the lateral posterior tibial slope (LPTS) are important for understanding the function of bony structures in the anatomy of the PLC. [4] The fabella is thought to act as Objectives: This study aims to analyze whether the lateral posterior condylar offset (LPCO) and lateral posterior tibial slope (LPTS) values are associated with the presence of fabella by evaluating the frequency of fabella, its location, and whether it is bilateral and the relationship of the fabella with age, sex, and the presence of osteoarthritis. Patients and methods:Between January 2016 and December 2020, computed tomography (CT) scans including 1,952 knee regions of 1,220 patients (861 males, 359 females; mean age: 54.5±19.7 years; range, 10 to 98 years) were retrospectively analyzed. Age, sex, and the presence of fabella whether unilateral (left or right) or bilateral were recorded. Of the patients with a bilateral knee CT, those with fabella on one side and without on the other were studied further to investigate the effect of fabella on the posterolateral corner (PLC). In these patients, the LPCO and LPTS values, presence of knee osteoarthritis, fabella-femoral distance, and sagittal anterior-posterior diameter of the fabella were evaluated. Results:While there was no evidence of fabella in 867 (71.1%) patients, it was present in 353 (28.9%) patients. The linear correlation analysis revealed that the correlations between the right LPCO and the right LPTS (r=-0.295; p<0.001) and between the left LPCO and the left LPTS (r=-0.574; p<0.001) were significant. It was observed that LPTS decreased with increasing LPCO. According to the results of the point biserial correlation analysis, there was a significant correlation between the presence of fabella on the right side and the right LPCO value (r=-0.643; p<0.001) and between the presence of fabella on the left side and the left LPCO (r=-0.284; p=0.024). When the two knees were compared, fabella was less present in the knee whose LPCO was higher than that of the other knee, whereas it was more common in the knee whose LPCO was lower than that of the other knee. We found a significant correlation between each side's fabella and LPCO values and between the presence of fabella on the left side and the left LPTS. Conclusion:The presence of fabella in the knee joint may be associated with LPCO and LPTS values of the knee. The comparison of the two knees of the same patient may reveal that if a fabella is present in a knee, the LPCO value of that knee is lower than that of the other knee. We believe that the reason for this is that the presence of fabella increases the distance to the center of rotation o...

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Prevalence of the fabella and its general characteristics in Turkish population with magnetic resonance imaging

Cited by 2 publications

References 30 publications

X-ray Imaging Versus Anatomical Dissection for Identification of the Fabella

X-ray Imaging Versus Anatomical Dissection for Identification of the Fabella

The prevalence of fabella and its relationship with the lateral posterior condylar offset and lateral posterior tibial slope values

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