Abstract
Introduction: Suprascapular notch (SSN) is a depression present on the superior border of scapula just medial to root of coracoid process. This notch is an important landmark in arthroscopic shoulder operations for the suprascapular nerve. The aim of present study was to classify the suprascapular notch in various types and to study morphological variations of it.
Materials and Methods: The study was conducted on dried, unbroken and completely ossified human scapulae obtained from Department of Anatomy, SMS Medical College and RUHS Medical College, Jaipur (Rajasthan) from February 2017 to January 2018. The suprascapular notch was classified on the basis of two classifications proposed by Natsis et al and Iqbal et al. Percentage of each type, the vertical depth, the maximum transverse diameter of the suprascapular notchand distance from supraglenoid tubercle to the base of the notchwere measured and compared with the previous studies.
Results: The suprascapular notch was present in 98% bones. The mean vertical depth was 11.54 mm (1.02-13.0 mm), transverse diameter was 14.04 mm (0.86-21.26 mm) and distance from supraglenoid tubercle to the base of the notch was 29.12 mm (25.46-38.70 mm). It was classified according to Natsis et al classification into type-I (2%), type-II (76%) type-III (20.4%) type-IV (1.6%) and type-V (0%).
Conclusion: The present study provided the data related to various types and anatomical variations of suprascapular notch which may be useful for clinicians to associate them with suprascapular nerve entrapment.
Keywords: Scapula, Scapular notch, Vertical diameter, Transverse diameter.
References
- Standring S, Ellis H, Healy JC, Johnson D, Williams A, Collins P et al. Gray’s Anatomy. In: Pectoral Girdle and Upper Limb. Johnson D Horold Ellis, editors. 39th Edinburg, London: Churchill Livingstone; 2005. P. 819-22.
- Moore KL, Dalley AF and Agur AM. Clinical Oriented Anatomy. 6th Philadelphia: Lippincotiliams& Wilkins; 2010.
- Koppel HP, Thompson WA. Pain and the frozen shoulder. Surg Gynecol Obstet. 1959;109:92-6.
- Antonoiou J, Tae SK, Wiliams GR, Bird S, Ramsey MJ, Iannotti JP. Suprascapular neuropathy: Variability in the diagnosis, treatment, and outcome. Clin OrthopRel Res. 2001;386:131-8.
- Edeland HG, Zachrisson BE. Fracture of the scapular notch associated with lesion of the suprascapular nerve. Acta Orthop Scand. 1975;46(758):763.
- Shishido H, Kikuchi S Injury to the suprascapular nerve during shoulder joint surgery: an anatomical study. J Shoulder Elbow Surg. 2001;10:372-376.
- Natsis K, Totlis T, Tsikaras P, Appell HJ, Skandalakis K. Proposal for classification of the suprascapular notch: a study on 423 dried scapulas. ClinAnat. 2007; 20(2):135-9.
- Iqbal K, Iqbal R, Khan SG. Anatomical variations in shape of suprascapular notch of scapula. J Morphol Sci. 2010;27:1-2.
- Polguj M, Jedrzejewski K, Podgórski M, Topol M. Correlation between morphometry of the suprascapular notch and anthropometric measurements of the scapula. Folia Morphol. 2011;70(2):109-15.
- Rengachary SS, Neff JP, Singer PA, Brackett CF. Suprascapular nerve entrapment neuropathy: A clinical, anatomical and comparative study. Neurosurg. 1979;5:441-6.
- Ticker JB, Djurasovic M, Strauch RJ, April EW, Pollock RG, Flatow EL, Bigliani LU. The incidence of ganglion cysts and other variations in anatomy along the course of the suprascapular nerve. J Shoulder Elbow Surg. 1998;7:472-478.
- G Soni, V Malik, L Shukla, S Chabbra, N Gaur. Morphometric Analysis of the Suprascapular Notch. The Internet Journal of Biological Anthropology. 2012;5(1):1-5.
- Sutheria LK, Nayak TV, Patel SV, Jadav HR, Pensi CA. Morphology and morphometric analysis of suprascapular notch. Int J Biomed Advance Res. 2013;4:35-39.
- Mahdy A A, Shehab A A. Morphometric Variations of the Suprascapular Notch as a potential cause of Neuropathy. Anatomical Study J Am Sci. 2013;9:189-97.
- Wang H, Chen C, Wu L, Pan C, Zhang W, Li Y. Variable morphology of the suprascapular notch: an investigation and quantitative measurements in Chinese population. Clin Anat. 2011;24(1):47-55.
- Rekha BS. Complete absence of suprascapular notch- a case report. Journal of Evolution of Medical and Dental Sciences. 2013;2(1):19-22.
- Patel P, Patel SV. Study of variations in the shape of suprascapular notch in dry human scapula. Int J Biomed Res. 2013; 4:3162-4.
- Warner JJP, Krushell RJ, Masquelet A, Gerber C. Anatomy and relationships of suprascapular nerve: anatomical constraints to mobilization of the supraspinatus and infraspinatus muscles in management of massive rotator-cuff tears. J Bone Joint Surg Am. 1992; 74: 36-45.
- De Mulder K, Marynissen H, Van Laere C. Arthroscopic transglenoid suture of Bankart lesions. Acta Orthop Belg. 1998; 64 160-66.
Corresponding Author
Chauhan Sangita
Sr. Professor, Department of Anatomy, S.M.S. Medical College, Jaipur, Rajasthan, India
DOI: https://dx.doi.org/10.18535/jmscr/v7i5.132
