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Bone

This tag is associated with 6 posts

Causes of Avascular Necrosis (AVN) Mnemonic

There are numerous causes of avascular necrosis (AVN), which is at its most basic definition when blood flow to a bone is interrupted or reduced. Numerous mnemonics have been proposed to remember the many causes of AVN. My favorite is probably GIVE INFARCTS:     GIVE INFARCTS ·       G- Gaucher disease ·       I- Idiopathic- Legg-Calve Perthes ·       … Continue reading

Thoracic Spine Burst Fracture

History: hit by car while riding bike A burst fracture is a type of traumatic spinal injury in which a vertebra breaks from a high-energy axial load (e.g., car accidents or falls from a great height or high speed, and some kinds of seizures), with shards of vertebra penetrating surrounding tissues and sometimes the spinal … Continue reading

Bone Infarcts

History: 55 year old male with knee pain.  This is a classic example of bone infarcts, here called osteonecrosis of the knee, which on radiographs is represented as a well defined sclerotic lesion with serpentine margins. In our example, the articular surfaces are mildly distorted, more so on the tibial plateau, causing collapse. On MRI, … Continue reading

Bone Metastases – Lytic versus Blastic

History: 60 year old male with lung cancer. This patient had metastatic lung cancer to the bones. Bone metastases are classified as either blastic or lytic: Lytic bone metastases occur in the following cancers: renal, lung, breast, thyroid, melanoma, chordoma, paraganglioma, GI tract, urothelial, ovarian, melanoma, chordoma, and paraganglioma. Blastic bone metastases occur in the following cancers: … Continue reading

Paget’s Disease

History: 60 year old male with hip pain. The differential diagnosis for this appearance on a Tc-99m MDP bone scan includes fibrous dysplasia, Paget’s disease, bone metastases, and primary bone tumor. This is a case of Paget’s disease. Paget’s disease is a disorder of abnormal and excessive bone remodeling, which results in deformed and weakened … Continue reading

Sinonasal Osteoma

History: 40 year old male with incidental finding on head CT done for minor head trauma.  This is the typical appearance for a Sinonasal Osteoma. Classically they are asymptomatic, and thus are incidental findings on imaging studies done for other reasons. Sinonasal osteomas are the most common benign tumor of the sinuses. They can be … Continue reading

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