What is unusual about the ossification of the clavicle?
In these species, the forelimb is attached to the rest of the body only by muscles. In man the ossification of the clavicle is unusual: it begins in membrane (see Chapter 3: Introduction to the Skeleton: Bone, Cartilage and Joints), and then develops a pair of cartilaginous centres that ossify.
Does the clavicle have a medullary cavity?
Even though it is classified as a long bone, the clavicle has no medullary cavity like other long bones. It is made up of spongy bone with a shell of compact bone. It is a dermal bone derived from elements originally attached to the skull. The whole clavicle develops from a cartilaginous anlage.
Can you get a ganglion cyst on your collarbone?
Cysts are filled with fluid and are not usually cancerous. A type of cyst called a ganglion cyst is common on the hand and wrist, but can also develop along the collarbone. In rare cases, cancerous and non-cancerous tumors can form on or near the collarbone. These lumps need to be seen by a doctor.
Can a fractured clavicle cause crepitus?
Swelling, ecchymosis, and tenderness may be noted over the clavicle. Abrasion over the clavicle may be noted, suggesting that the fracture was from a direct mechanism. Crepitus from the fracture ends rubbing against each other may be noted with gentle manipulation.
Can arthritis cause a lump on collarbone?
A: The most likely cause for a bump in that location is osteoarthritis in your sternoclavicular joint. That joint is exactly in the location you described — at the intersection of your breastbone (sternum) and collarbone (clavicle).
When do clavicle fractures need surgery?
Specifically, surgery should be strongly considered if the fracture is shortened by 2 centimeters or more, displaced more than 100% (the fractured ends aren’t touching at all), when there are specific fracture patterns (such as Z-type fractures), or when the fractures are highly comminuted (shattered).
Are there long bone tumours in the clavicle?
No particular predilection of location of the tumour within the clavicle was seen. Functional and oncological results of claviculectomy were good. The distribution of types of tumours in the clavicle is quite different from long-bone tumours.
Are there benign lytic lesions of the clavicle?
The studies on benign lytic lesion of clavicle are sparse. Asymptomatic nature of lesions, rare occurrence, the difficulty in interpretation of the X-rays because of the surrounding structures and striking similarities in various lesions further make the diagnosis of such atraumatic lytic lesions difficult.
When to suspect expansile or lytic bone lesions?
The diagnosis should be suspected in patients with pathological fractures and hypercalcemia.
Is the clavicle bone a subcutaneous bone?
This bone is subcutaneous throughout its length, and it is occasionally pierced by the middle supraclavicular nerve. Fortunately, the clavicle is a bone that can be resected without causing significant disability [20].