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

1 Citation (Scopus)


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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