Radiological study of fabella in Omani subjects at a tertiary care center

Omar Darwish Al Matroushi, Srinivasa Rao Sirasanagandla*, Ammar Al Shabibi, Athari Al Obaidani, Humoud Al Dhuhli, Sanjay Jaju, Mohamed Al-Mushaiqri

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Ethnic diversity is associated with variability in the prevalence rates of fabella. We aimed to evaluate the prevalence and the radiological features of fabella in Omani patients. This is a retrospective analysis of hospital electronic database of patients referred for radiological investigations (radiographs and magnetic resonance imaging) of the knee, at a tertiary care referral center. Descriptive statistics were performed to determine the prevalence of fabella. Chi-square test was used to determine the association between sex or age with respect to the presence of fabella. A total of 813 knee radiographs were reviewed for the presence of fabella. Fabella was found in 24.1% of total cases. A statistically significant sex difference was observed with respect to the presence of fabella in left knees in males (P<0.01). The presence of fabella was significantly associated with age groups for the right (P<0.05) and left knees (P<0.01). In magnetic resonance imaging film reviews, all the identified fabellae (20.2%) were bony structures and were located within the lateral head of the gastrocnemius muscle. There were no cartilaginous fabellae detected. The current study revealed a prevalence of 24.1% of fabella in Omani subjects which is almost similar to the results as seen in Caucasian ethnic populations.

Original languageEnglish
Pages (from-to)315-320
Number of pages6
JournalAnatomy and Cell Biology
Issue number3
Publication statusPublished - Sept 2021


  • Knee joint
  • Prevalence
  • Radiography
  • Sesamoid bones

ASJC Scopus subject areas

  • Anatomy
  • Histology
  • Developmental Biology
  • Cellular and Molecular Neuroscience
  • Cell Biology


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