The prevalence of persistence metopic suture (metopisim) among Kurdish populations of Erbil city.
Keywords:Prevalence, Metopisim, Inter-frontal suture, anatomical variations, Kurdish peoples
Background and objective: A fully developed frontal bone consists mainly of two portions separated by a vertically oriented suture called metopic, frontal or inter-frontal suture, it’s considered to be the first skull suture to close metopic suture physiologically closes at different times of age and could occur from birth through age 8 years,In some individual (and as a normal variant) a persistent metopic suture can be seen in the midline running down the frontal bone and the condition is referred to as metopisim. The study aims to investigate the prevalence of metopisim among the Kurdish population of Erbil city,type of metopisim, gender and/or environmental or racialimpact will also be assessed.
Methods: This retrospective/radiological study was conducted on conveniently selected PA (Caldwell view) plain radiographic images of 613 Kurdish individuals of mixed genders, ages ranging between 10 to 64 years and images were taken from the periods between April 2020 to May 2022 for various medical reasons but mostly were for assessment of blunt head trauma.
Results:Out of 613 assessed P.A. radiographs only in 17 cases showed the presence of metopisim, (12 females and 5 males), metopisim was of complete type in just 4 cases; 3 were females and just 1 of them was a male case and it was incomplete in 13 of the cases; 9 females and just 4 were among males.
Conclusion: It’s of crucial importance to identify the metopic suture persistence and its interracial and ethnic diversity as its existence presence could be mistaken and misdiagnosed as a vertical or an oblique cranial fracture upon assessments of radiological images.
Keywords: Prevalence, Frontal bone, Metopisim, Metopic suture, Frontal suture, Inter-frontal suture, Kurdish peoples, anatomical variations.
Sadler T W. Longmans medical embryology with clinical correlations; 14th edition, ELSEVIER Ohio, 2019. 11; 147-155.
Laurence E W. Snell's clinical anatomy by region. 10th edition, Lippincott & Williams, London, 2019; 621-633.
Richard L D, Wayne A V, Adam W M. Grays' medical human anatomy with clinical correlations; 4th edition, Wiley, Baltimore 2020; 830-834.
Keith L M, Arthur F D, Anne M R. Clinically oriented anatomy by system. 8th edition, WB Publishing inc., NYC. 2017; 960-966.
Sommer& Hoffmann.Incidence of anatomical variations according to the International Frontal bone Anatomy Classification (IFAC).Arch Rhinolaryngol;:–3146.
Manzanares, C & Dhem, A. Metopic sutural closure in the Scottish skull. J. Anat., 2000;161:203-15.
Bademci, G, Kendi, T., Agalar, F. Persistent metopic suture can mimic the skull fractures in the emergency setting? Int JNeurocirugia, 2007;18: 238-40.
Bryce, T. H. & Young, M. Observations on metopism among Australians.J. Anat., 2003;51(Pt. 5):153- 66.
Torgersen, J. Hereditary factors in the sutural pattern of the skull. Acta Radiol., 1999;36(5):374-78.
Del SolM., Binvignat, O, Bolini T. Metopism in Brazilian individuals. Rev. Paul. Med., 2007; 107(2):105-7.
Caffey, J.: Pediatric radiography, diagnosis and clinical interpretations. 9th ed. Vol 5, London Year Book, Medical Publication Inc., 2001; 16:10-25.
Levine, J. P., Bradley, J. P.; Roth, D. A., McCarthy, J. G. & Longaker, M. T. Studies in cranial suture biology: regional dura mater determines overlying suture biology. Plast. Reconstr. Surg., 2009; 101(6):1441-7.
Carolinberry, A. & Berry, R. J. Genetic variation in the human cranium. J. Anat.,2005; 109:372-79.
Das, A. C.; Saxena, R. C. & Beg, M. A. Q. Incidence of Metopic suture among differentIndian populations. J. Anat. Soc. India,2006; 22:138-6
Ajmani, M.L., Mittal, R.K., Jain, S.P.: Incidence of the metopic suture in adult Nigerian skulls. J Anat 2003; 137: 1:177-183.
Kim HJ, Jung Cho M, Lee JW, Tae Kim Y, Kahng H, Sung Kim H. The relationship between anatomic variations of frontal sinuses and existence of metopism.Otolaryngol.; 126:1067–1072.
Qi W, Yuan P, Xing M. Anatomy, classification of metopisim and its clinical significance in frontal sinus surgery in Japanese subjects.Med J.; 370–373.
Torgersen J. The developmental genetics and evolutionary meaning of the metopic suture.J Phys Anthropol.; 9(2):193–210.
Nikolova S, Toneva D, Georgiev I. Morphometric evaluations of the frontal bone and relation between persistent metopic suture and frontal sinus variations. Am J Phys Anthropol.;165:492–5.
Batan P, Hadad M, Abi-Nadir K, Abi-Ghosn A. Incidence of metopism among Lebanese populations. Radi J Clin An. 2022; 16(2):148-51.
WOO J. K. Racial and sexual variations in the frontal bone and its relation to other anatomical variants.J of Phy Ant.;12(3):321–326.
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