Flashcards in Benign Tumors Deck (95)
Do most benign tumors occur early or later in life?
Early (before age 20)
Are giant cell tumors benign or malignant?
80% benign but 20% malignant
What is the age range for a giant cell tumor?
What is the male to female ratio for a GCT?
What is the most common benign tumor of the sacrum?
Giant cell tumor
What is the most common location for GCT?
85% in the long bones, mostly distal femur and proximal tibia, distal radius, proximal humerus
What is unique about the male to female ratio of GCT?
Females more likely when malignant
What is the key feature about the location of bone with GCT?
What is the most common benign osseous tumor?
Solitary osteochondroma (50%)
What is the age of occurrence for an osteochondroma?
Which tumor is a bony exostosis on the external surface of a bone and usually is lined by a hyaline cartilage cap?
What are the two types of osteochondromas?
Where are sessile osteochondromas commonly located?
Humerus and scapula
Where are pedunculate osteochondromas commonly located?
Knee, hip, ankle
Which type of osteochondromas has a cartilage cap?
What are some of the descriptive terms used for a pedunculated osteochondroma?
"Coat hanger exostosis" and "cauliflower cap"
Osteochondromas are found in what part of a long bone?
Although some locations are more common than others, generally where can osteochondromas be found?
Any bone formed by endochondral ossification
Do the exostoses of the osteochondromas tend to point toward or away from the nearby joint?
A subcondylar process pointing in which direction from the joint is considered a normal finding?
TOWARD the joint
What is another name for hereditary multiple exostosis?
What condition is an inherited autosomal dominant condition characterized by multiple osteochondromas often causing metaphyseal overgrowth?
Hereditary multiple exostosis
When is hereditary multiple exostosis usually discovered?
2-10 years of age
What is the average number of exostoses seen with hereditary multiple exostosis?
10 (can be anywhere from a few to 100 though)
How can hereditary multiple exostosis become dangerous?
5-20% become malignant, possible cord compression, possible obstructive uropathy
What radiographic feature of the hands can be seen with hereditary multiple exostosis?
Shortening of the 4th and 5th metacarpals
What radiographic feature of the fingers and toes can be seen with hereditary multiple exostosis?
What radiographic feature of the radius can be seen with hereditary multiple exostosis?
Madelung (bending) or bayonet deformity
What tumor is non-neoplastic with a fluid filled cystic cavity lined with fibrous tissue?
Simple bone cyst