The superficial temporal artery: A meta-analysis of its prevalence and morphology

Introduction: The superficial temporal artery (STA) is a terminal branch of the external carotid artery. It supplies the regions of scalp and face. The morphometrical data concerning STAs are not consistent; therefore, in this systemic review and meta-analysis, we aimed in this to provide an up-to-date data on its anatomic features. Material and methods: In order to do this, PubMed, Embase, ScienceDirect, and Web of Science were searched. We followed the Preferred Reporting Items and Review and Meta-Analyses guidelines for the meta-analysis. Studies that reported the prevalence and anatomical data regarding STA were included in further analyses. Results: Out of 1,446 studies initially evaluated, 21 were included in the meta-analysis (874 patients/donors). The STA diameter was 1.5 mm (95% confidence interval [CI]: 1.47-1.53 mm). The frontal and parietal branches of the STA were present in 97.6% (95% CIs: 94.6-99.5%) and 96.4% (95% CIs: 93.5-98.5%) of the cases, respectively. The STA bifurcation point was located above the zygomatic arch in 79.1% (95% CI: 68.0-84.3), below the zygomatic arch in 6.7% (95% CI: 2.4-12.1), and on the zygomatic arch in 11.1% of the cases (95% CI: 5.4-17.5). There was no bifurcation of the STA in 3.1% of the cases (95% CI: 0.4-7.3). Conclusion: The most comprehensive analysis of STA morphological features is presented. The results from this evidence-based anatomical study will improve understanding of the clinical STA anatomy, which in turn has major implications for understanding the STA in clinical practice.