Abstract
The aim of this paper is to illustrate the various pathological lesions encountered in clavicle other than traumatic. Clavicle is not a common structure for investigation, except when trauma is suspected. However, whenever a pathological lesion is to be studied, conventional radiology is the first modality to adopt. There are no standard radiographic techniques to study the clavicle. Often it is seen on a conventional chest radiograph. Many systemic disorders reflect on clavicles. Cross sectional imaging helps very little except in neoplastic conditions. The imaging appearances are described in most of the lesions that are found in clavicle.
Highlights
The clavicle is a long bone with a medullary cavity.Unlike other long bones, it has an lntnamembranous origin
It is the first bone to ossify In the fetus. It is formed by two primary ossification centers for the body, one medial and one lateral, which appear during the 5th and #{243w}tehek of intrauterine life (Figure 1)
It is the last epiphysis to ossify in the body at 18 to 20 years (Figure 2)
Summary
The clavicle (collar bone) is a long bone with a medullary cavity. Unlike other long bones, it has an lntnamembranous origin. It is the first bone to ossify In the fetus It is formed by two primary ossification centers for the body, one medial and one lateral, which appear during the 5th and #{243w}tehek of intrauterine life (Figure 1). The third ossification center is secondary and represents the only epiphysis at the medial end of the bone. An inregular concavity may sometimes be present near the medial end of the bone along its infenor surface. It is the rhomboid fossa, the site at which the costoclavicular ligament is attached (Figure 4). A small foramen may be present in the midportion of the bone, along its superior border (Figure 5) This foramen transmits the nutrient anteny and, at times, the supraclavicular nerve. Because of the two articulations at the ends of the bone, many arthnitides may involve the bone
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