Coracoclavicular (CCJ) joint a diarthrodial synovial
articulation sometimes exists between the conoid tubercle of the clavicle &
superior surface of the coracoid process. It presents with a variable frequency
ranging between 0.55% and 30%. This unique entity is usually asymptomatic but may
sometimes present with pain or predispose to arthritic changes in neighbouring
joints of the shoulder region. The study was undertaken to find out the
prevalence of this joint in the Indian population from osteological samples and
included 500 scapulae; 250 right and 250 on the left side. The observations and
analysis were done during a 6 month period from June 2017- November 2017.
Evidence of CCJ was obtained in the form of definitive facets on the superior
surface of the coracoid process. The presence of facets for the joint was
observed in 21.8% with a higher proportion on the left side (26%) as compared
to the right (17.6%). Facets are presented with a spectrum of shapes and
surface features. CCJ is not rare and likely to have an acquired etiology favoured
by genetic and environmental factors. We would like to propose that the
coracoclavicular joint is not rare, but rather, a common variant of the
pectoral girdle. The facets displayed distinctive shapes with unique surface
features and surface projection. On the basis of these variations in the
morphology of the articular surfaces, we would like to suggest an acquired
etiology in the formation of these joints.
Author(s) Details:
Sehgal Garima,
Department of Anatomy, King George’s Medical University, India.
Rani
Anita,
Department
of Anatomy, King George’s Medical University, India.
Chopra Jyoti,
Department of Anatomy, King George’s Medical University, India.
Kumar Navneet,
Department of Anatomy, King George’s Medical University, India.
Please see the link here: https://stm.bookpi.org/ANUMS-V9/article/view/13633
