Glenoid bare spot

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Glenoid bare spot, also known as glenoid bare area, is a small central or slightly eccentric area of the inferior glenoid fossa, where the articular cartilage is markedly thinner or completely absent 2. It is considered to be a normal agingageing-related phenomenon 1.

Epidemiology

GlenoidThe glenoid bare spot can be found in as much as 80-88% of adult cadavers 1,3.

It is almost never observed in children younger than 10<10 years old 4,5 and not at all in fetuses 8. Its incidence seems to increase with age.

Pathology

The etiologyaetiology of the bare area is not fully understood - it was previously speculated that it is an acquired lesion due to repetitive stress 2,4,8. Recently, a developmental origin associated with fusion of glenoid ossification centerscentres has been proposed 5.

Radiographic features

It is a small (2-12mm of range), roughly round area of thinned cartilage that is located in the very centercentre of inferior glenoid fossa 4,7 or slightly anterior to it 3,6. It is best appreciated using fluid-sensitive sequences like T2 FSE in coronal and axial planes.

It should not be accompanied by any pathologic changes of the underlying bony glenoid.

It is considered to be a normal agingageing-related phenomenon and should not be mistaken for cartilage ulceration or osteochondral defect.

See also

Tubercle of Assaki is a similar phenomenon found in the same location as the bare spot.

  • -<p><strong>Glenoid bare spot</strong> also known as <strong>glenoid bare area</strong> is a small central or slightly eccentric area of inferior <a title="Glenoid fossa of scapula" href="/articles/glenoid">glenoid fossa</a>, where the articular cartilage is markedly thinner or completely absent <sup>2</sup>. It is considered to be a normal aging-related phenomenon <sup>1</sup>.</p><h4>Epidemiology</h4><p>Glenoid bare spot can be found in as much as 80-88% of adult cadavers <sup>1,3</sup>.</p><p>It is almost never observed in children younger than 10 years old <sup>4,5 </sup>and not at all in fetuses <sup>8</sup>. Its incidence seems to increase with age.</p><h4>Pathology</h4><p>The etiology of bare area is not fully understood - it was previously speculated that it is an acquired lesion due to repetitive stress <sup>2,4,8</sup>. Recently, a developmental origin associated with fusion of glenoid ossification centers has been proposed <sup>5</sup>.</p><h4>Radiographic features</h4><p>It is a small (2-12mm of range), roughly round area of thinned cartilage that is located in the very center of inferior glenoid fossa <sup>4,7</sup> or slightly anterior to it <sup>3,6</sup>. It is best appreciated using fluid-sensitive sequences like T2 FSE in coronal and axial planes.</p><p>It should not be accompanied by any pathologic changes of the underlying bony glenoid.</p><p>It is considered to be a normal aging-related phenomenon and should not be mistaken for cartilage ulceration or osteochondral defect.</p><h4>See also</h4><p><a href="/articles/tubercle-of-assaki">Tubercle of Assaki</a> is a similar phenomenon found in the same location as the bare spot.</p>
  • +<p><strong>Glenoid bare spot</strong>, also known as <strong>glenoid bare area,</strong> is a small central or slightly eccentric area of the inferior <a href="/articles/glenoid" title="Glenoid fossa of scapula">glenoid fossa</a>, where the articular cartilage is markedly thinner or completely absent <sup>2</sup>. It is considered to be a normal ageing-related phenomenon <sup>1</sup>.</p><h4>Epidemiology</h4><p>The glenoid bare spot can be found in as much as 80-88% of adult cadavers <sup>1,3</sup>. It is almost never observed in children &lt;10 years <sup>4,5 </sup>and not at all in fetuses <sup>8</sup>. Its incidence seems to increase with age.</p><h4>Pathology</h4><p>The aetiology of the bare area is not fully understood - it was previously speculated that it is an acquired lesion due to repetitive stress <sup>2,4,8</sup>. Recently, a developmental origin associated with fusion of glenoid ossification centres has been proposed <sup>5</sup>.</p><h4>Radiographic features</h4><p>It is a small (2-12mm of range), roughly round area of thinned cartilage that is located in the very centre of inferior glenoid fossa <sup>4,7</sup> or slightly anterior to it <sup>3,6</sup>. It is best appreciated using fluid-sensitive sequences like T2 FSE in coronal and axial planes.</p><p>It should not be accompanied by any pathologic changes of the underlying bony glenoid.</p><p>It is considered to be a normal ageing-related phenomenon and should not be mistaken for cartilage ulceration or osteochondral defect.</p><h4>See also</h4><p><a href="/articles/tubercle-of-assaki">Tubercle of Assaki</a> is a similar phenomenon found in the same location as the bare spot.</p>

References changed:

  • 1. Alashkham A, Alraddadi A, Soames R. Bare Spot and Tubercle of Assaki. JSES Open Access. 2017;1(3):141-3. <a href="https://doi.org/10.1016/j.jses.2017.07.005">doi:10.1016/j.jses.2017.07.005</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/30675557">Pubmed</a>
  • 2. Warner J, Bowen M, Deng X, Hannafin J, Arnoczky S, Warren R. Articular Contact Patterns of the Normal Glenohumeral Joint. J Shoulder Elbow Surg. 1998;7(4):381-8. <a href="https://doi.org/10.1016/s1058-2746(98)90027-1">doi:10.1016/s1058-2746(98)90027-1</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/9752648">Pubmed</a>
  • 4. Kim H, Emery K, Salisbury S. Bare Spot of the Glenoid Fossa in Children: Incidence and MRI Features. Pediatr Radiol. 2010;40(7):1190-6. <a href="https://doi.org/10.1007/s00247-009-1494-0">doi:10.1007/s00247-009-1494-0</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/20012949">Pubmed</a>
  • 5. Djebbar S, Rosenberg Z, Fitzgerald Alaia E, Agten C, Zember J, Rossi I. Imaging Features of Glenoid Bare Spot in a Pediatric Population. Skeletal Radiol. 2018;47(1):45-50. <a href="https://doi.org/10.1007/s00256-017-2755-x">doi:10.1007/s00256-017-2755-x</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/28823051">Pubmed</a>
  • 6. Aigner F, Longato S, Fritsch H, Kralinger F. Anatomical Considerations Regarding the "Bare Spot" of the Glenoid Cavity. Surg Radiol Anat. 2004;26(4):308-11. <a href="https://doi.org/10.1007/s00276-003-0217-8">doi:10.1007/s00276-003-0217-8</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/14872284">Pubmed</a>
  • 7. Burkhart S, DeBeer J, Tehrany A, Parten P. Quantifying Glenoid Bone Loss Arthroscopically in Shoulder Instability. Arthroscopy: The Journal of Arthroscopic & Related Surgery. 2002;18(5):488-91. <a href="https://doi.org/10.1053/jars.2002.32212">doi:10.1053/jars.2002.32212</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/11987058">Pubmed</a>
  • 8. Tena-Arregui J, Barrio-Asensio C, Puerta-Fonollá J, Murillo-González J. Arthroscopic Study of the Shoulder Joint in Fetuses. Arthroscopy. 2005;21(9):1114-9. <a href="https://doi.org/10.1016/j.arthro.2005.05.013">doi:10.1016/j.arthro.2005.05.013</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/16171637">Pubmed</a>
  • 1. Alashkham A, Alraddadi A, Soames R. Bare spot and tubercle of Assaki. (2017) JSES open access. 1 (3): 141-143. <a href="https://doi.org/10.1016/j.jses.2017.07.005">doi:10.1016/j.jses.2017.07.005</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/30675557">Pubmed</a> <span class="ref_v4"></span>
  • 2. Warner JJ, Bowen MK, Deng XH, Hannafin JA, Arnoczky SP, Warren RF. Articular contact patterns of the normal glenohumeral joint. J Shoulder Elbow Surg. 1998;7(4):381-388. <a href="https://doi.org/10.1016/S1058-2746(98)90027-1">doi:10.1016/s1058-2746(98)90027-1</a> - <a href="https://pubmed.ncbi.nlm.nih.gov/9752648/">Pubmed</a> <span class="ref_v4"></span>
  • 4. Kim H, Kim EK, Kim SS, Kim. Bare spot of the glenoid fossa in children: incidence and MRI features. (2010) Pediatric radiology. <a href="https://doi.org/10.1007/s00247-009-1494-0">doi:10.1007/s00247-009-1494-0</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/20012949">Pubmed</a> <span class="ref_v4"></span>
  • 5. Djebbar S, Djebbar RZ, Djebbar FAE, Djebbar AC, Djebbar ZJ, Djebbar RI, Djebbar. Imaging features of glenoid bare spot in a pediatric population. (2018) Skeletal radiology. <a href="https://doi.org/10.1007/s00256-017-2755-x">doi:10.1007/s00256-017-2755-x</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/28823051">Pubmed</a> <span class="ref_v4"></span>
  • 6. Aigner F, Aigner LS, Aigner FH, Aigner KF, Aigner. Anatomical considerations regarding the "bare spot" of the glenoid cavity. (2004) Surgical and radiologic anatomy : SRA. <a href="https://doi.org/10.1007/s00276-003-0217-8">doi:10.1007/s00276-003-0217-8</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/14872284">Pubmed</a> <span class="ref_v4"></span>
  • 7. Burkhart SS, Debeer JF, Tehrany AM, Parten PM. Quantifying glenoid bone loss arthroscopically in shoulder instability. Arthroscopy. 2002;18(5):488-491. doi:10.1053/jars.2002.32212 <a href="https://doi.org/10.1053/jars.2002.32212">doi:10.1053/jars.2002.32212</a> <span class="ref_v4"></span>
  • 8. Tena AJ, Tena BAC, Tena PFJ, Tena MGlJ, Tena. Arthroscopic study of the shoulder joint in fetuses. (2005) Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association. <a href="https://doi.org/10.1016/j.arthro.2005.05.013">doi:10.1016/j.arthro.2005.05.013</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/16171637">Pubmed</a> <span class="ref_v4"></span>i

Updates to Synonym Attributes

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