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34 Cards in this Set
- Front
- Back
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What destructive pattern has a recognizable form and is well-defined? |
Geographic |
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What destructive pattern has no recognizable form or shape AND refers to the spongy inner bone? |
Moth-eaten |
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What destructive pattern has no recognizable form or shape AND refers to the cortical bone? |
Permeative |
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What is the difference between lytic and blastic regions? |
(Note: Osteoclasts break down bone; osteoblasts build up bone.) The holes that develop due to parts of bones dissolving because of osteoclastic activity are called lytic lesions. Blastic regions are areas in which bones that are harder due to abnormal osteoblastic action. In both cases, bone breaks more easily than normal bone. |
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What is an osteoma? |
Osteomas are benign bony outgrowths. |
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How quickly do osteomas grow? |
They are slow growing, multiple lesions. |
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What is the ratio of male and females in developing osteoma? |
M:F=2:1 |
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How do osteomas appear on radiographs? |
Radiographic features sharp, circumscribed (clear borders) radiolucent mass protruding (sticking out) from the bone surface. "Radiolucent" means dark images on x-ray film. |
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What is osteoid osteoma? |
An osteoblastic lesion with central area of new bone formation, known as a nidus. |
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When is pain from osteoid osteoma generally felt and what helps it? |
Night-time. Pain relieved by aspirin. |
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What percentage of osteoid osteomas are seen in the foot? |
10% |
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What is the typical age and gender of victims of osteoid osteoma? |
5-25 (age); Male:2:1 |
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What is the difference in the new bone formation of osteomyletis (involucrum stage) and osteoid osteoma? |
Involucrum is new bone formation from the stipped surface of periosteum. It occurs during osteomyelitis.
Osteoid osteomas form new bone in nidus, the central area with lesions ( an area of thickened sclerotic bone).
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What is the most common benign bone lesion? |
Osteochondroma |
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What is osteochondroma? |
A protruding, mushroom-shaped exostosis (an exostosis is a benign bony growth projecting outward from a bone surface). It usually originates from the metaphysis (near the growth plate of a developing bone) and points AWAY from the joint. |
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Where are chondroblastomas located? |
Common at the ends of long bones(epiphysis), knees, and proximal humerus |
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How do chondroblastomas look on x-rays? |
Dark areas show on the x-ray at the end of the bone("epiphyseal radiolucency") with spotty calcification |
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What age do chondroblastomas occur? |
Ages 5-25 |
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What is fibrous cortical defect? |
It is a round to oval radiolucent intracortical lesion that typically erodes the outer cortical surface.
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What age do fibrous cortical defects appear? |
Ages 4-8, rare after 14 |
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What is fibrous dysplasia? |
This is a condition of abnormal bone growth in which scar-like fibrous tissue replaces normal bone growth, leading to weakening of the bone. |
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How does fibrous dysplasia appear on x-ray? |
-Ground glass appearance -Well-defined intramedullary lesion (Inside the medulla, the central part of the bone) |
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What is the only bone tumor with female prevalence? |
Giant Cell Tumor of Bone |
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Giant cell tumor x-ray? |
Rapidly expansile (growing) radiolucent lesion (dark spot) |
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Where is Giant Cell Tumor of the bone most likely to occur? |
Phalanges, metatarsals, talus, and posterior calcaneus |
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What is another name for enostosis? |
Bone Island |
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What is enostosis? |
It is: -Discrete (distinct) -Intramedullary (inside the bone central bone medulla) -Sclerotic (hardening of a body part) -Comprised of compact bone |
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What are the symptoms of enotosis? |
Generally none |
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Where is enostosis most commonly found? |
Posterior calcaneus, lesser metatarsal heads, talar neck, and distal tibia |
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What does enchondromatosis mean? |
The condition of having cartilage cyst found in bone marrow. It especially involves the hands and feet. |
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How are Ollier's Disease and Maffucci's Syndrome alike? |
Both are conditions of multiple enchondromatosis. |
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How are Ollier's Disease and Maffucci's Syndrome different? |
Only with Maffuci's Syndrome, there is soft tissues hemangiomas present. These are benign tumors found in the blood vessel linings. They are usually self-involuting(tend to decrease in size) |
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What are three differences between simple bone cysts and aneurysmal bone cysts? |
1.Simple bone cysts: A fluid-filled intramedullary cavity Aneurysmal Bone Cysts (ABC): Rapidly growing lesion with multiple blood-filled cystic cavities present 2. No pain with simple bone cysts; rapid onset of pain with ABC 3. Fluid can be filled with serum, serum and blood, or blood with simple bone cysts. With ABC, it is blood-filled |
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What is this? |
Look at the images from the class handout and try to recognize the bone condition. |
