Osteochondroma is the most common bone tumor, forming cartilage-capped bony outgrowths on bones, typically during growth between ages 13-15. It occurs in the long bones of the legs, pelvis, or scapula. While most osteochondromas are asymptomatic, they can cause pain, nerve compression, or limit joint motion. Treatment involves surgery to remove symptomatic osteochondromas, while asymptomatic cases simply require follow up. Rapid growth, post-pubertal onset, or a cartilage cap over 2cm may indicate potential malignancy.

1. OSTEOCHONDROMA

2.  Osteochondroma or osteocartilaginous
exostoses is the most common benign
tumor of the bones.
 The tumor forms cartilage-capped bony
outgrowth on the surface of bones
(exostoses)
 It mostly occurs where cartilage forms bone.
Commonly affects long bones in the leg,
pelvis, or scapula
 Target- METAPHYSIS
 Development take place during skeletal
growth between the ages of 13 and 15 and
ceases when the growth plate fuses at
puberty.

3.  Osteochondromas represent 35% of all benign
tumors and 8% of all bone tumors.
 Osteochondromas do not result from injury and
the cause is idiopathic.
 Recent research has indicated that multiple
osteochondromas is an autosomal dominant
inherited disease

4. Transmission
Non
hereditary
85%
Hereditary
15%
Number
Solitary
Multiple
Size
Sessile
Pedunculated

5.  The majority of osteochondromas are
symptomless and are found incidentally.
 Hard immobile painless palpable mass,
 Nerve & vascular compression(numbness,
weakness, loss of pulse)
 Muscle soreness
 Bursitis
 If the tumor is found under a tendon, it can cause
pain during movement causing restriction of joint
motion.

7. • NO
TREATMENT
• (only follow up)
Solitary and
asymptomatic
• COMPLETE
SURGICAL
EXCISION
Symptomatic

8. Signs of malignancy
Pain at
the site
Growth
after
puberty
Cartilage
cap
>2cm