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Primary Benign Tumor

Primary Benign Tumor- up to HME

QuestionAnswer
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