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Primary Benign Tumor
Primary Benign Tumor- up to HME
| Question | Answer |
|---|---|
| What is an osteoclastoma? | Giant cell tumor |
| what does quasi-malignant mean? | most are benign, some are malignant |
| Giant cell tumors are quasi-malignant, what is the percentage of benign vs. malignant presentations of the tumor? | benign: 80% Malignant: 20% |
| what is the age range seen with giant cell tumors? | 20-40 |
| where are giant cell tumors seen? | metaphysea/subarticular/eccentric Sub-articular: grows up to subchondral bone |
| where is the most common place to find a giant cell tumor? | knee: tibia and femur, distal radius |
| what are the symptoms of giant cell tumor: | localized pain and aching, joint pain and restricted motion |
| What are imaging features of a giant cell tumor? | osteolytic, geographic, multiloculated and septated, extends to subarticular bone, expansile, eccentric, absence of corticated border |
| can you differnectiate benign from malignant GCT? | no |
| What is the pneumonic for bubbly lytic lesions that like the spine? | alphabet soup: ABC/GCT/OB/OC/OO |
| ABC? | Aneurysmal bone cyst |
| GCT? | giant cell tumor |
| OB? | Osteoblastoma |
| OC | Osteochondroma |
| OO? | osteoid osteoma |
| what is the most common benign skeletal growth or tumor? | Solitary Osteochondroma |
| what percent of benign bone tumors does solitary osteochondroma represent? | 50% |
| 75% of solitary osteochondroma are under what age? | 20 yo. |
| what is the percentage of malignant transformation of osteochondroma? | <1% |
| M:F ratio of osteochondroma? | 2:1 |
| what are the symptoms of OC? | most are asymptomatic, if they are painful: malignant transformation, fracture or bursitis |
| what are the two forms of solitary osteochondroma? | sessile or pedunculated |
| what region of bone is OC found in? | metaphyseal |
| common locations of solitary OC? | femur, humerus, tibia, pelvis, ribs, scapula |
| what is another word for pedunculated solitary OC? | coat hanger exocytosis |
| where in long bones are sessile and pedunculated OC found? | metaphyseal area |
| what is the radiographic features of pedunculated solitary OC | thin, elongated stalk, continuous cortex and medullary space, calcified cap, |
| pedunculated solitary OC projects which way in regards to the joint its near? | away from joint |
| sessile solitary OC Radiographic features: | wide and broad base at metaphysis |
| cartilage cap in sessile or pedunculated | penduculated |
| HME stands for | hereditary multiple exostoses |
| HME is the multiple form of | osteochondroma |
| etiology of HME? | inherited overgroth |
| location of HME in bones | metaphyseal region |
| age of Dx of HME: | 2-10yo |
| most common locations of HME | knee, ankle, shoulder, wrist |
| what deformity can HME take the appearance of in the wrist? | madelung |
| malignant transformation percentage with HME? | 5-25% |
| radiographic sign of HME in hip | hip: brauma bull |
Created by:
kclarke15
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