• Journal of Korean Dental Science
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• v.12 no.2
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• pp.66-72
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• 2019

Osteochondroma is a bone tumor with cartilaginous growth potential that generally appears near the growth plate of long bones in areas such as hip, knee, and shoulder joints, related to the nature of endochondral ossification and it is known a common benign bone tumor. However, it has been very rare in craniofacial region possibly because craniofacial bone is largely formed by intramembranous ossification. Moreover, reports on the solitary type of osteochondroma in mandibular condyle has been extremely rare. Osteochondroma in mandibular condylar may show various symptoms similar to general temporomandibular joint disorders (TMDs), such as pain in the condylar area during mouth opening, internal derangement, facial asymmetry or posterior open bite. Therefore, it can be disregarded for a long time period without any adequate treatment. Surgical excision has been the treatment option for the solitary osteochondroma with very low recurrence rate reportedly. In this case report, a rare case of solitary osteochondroma developed in unilateral mandibular condyle is presented with emphasis on differential diagnosis with general TMDs.

• The Journal of the Korean bone and joint tumor society
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• v.2 no.1
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• pp.116-119
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• 1996

The solitary osteochondroma is a hamartoma of the skeleton which derives from an aberrant subperiosteal germ of the fertile cartilage. Osteochondromas, which are uncommon in the hand can occur at the distal end of the proximal and middle phalanx away from the epiphyseal plate region. We experienced a rare case of solitary osteochondroma arising from distal end of fifth proximal phalanx of hand, and limiting the active motion of proximal interphalangeal joint. The patient was treated by marginal excision and tumor showed characteristic microscopic findings of osteochondroma.

• Clinics in Shoulder and Elbow
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• v.3 no.1
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• pp.39-43
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• 2000

Osteochondromas, the most common tumor of the scapula, are one type of bone abnormality that may cause symptomatic scapula pseudowinging. This type of scapula winging is structural and maybe associated with significant scapula crepitus. We describe a case of a scapular solitary osteochondroma, arised from the ventral surface of the scapula in a 15-year-old boy, produced pseudowinging and scapula crepitus. The winging and scapula crepitus are alleviated with resection of the bony abnormality.

• Clinics in Shoulder and Elbow
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• v.19 no.3
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• pp.172-175
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• 2016

Osteochondromas are one of the most common benign bone tumors usually involving extraarticular metaphysis of long bone. Solitary intra-articular osteochondroma arising from the elbow joint has rarely been reported. We present a case of 23-year-old female who had pain and limited motion of the left elbow as a result of intraarticular osteochondroma of the distal humerus. Arthroscopic excision of the osteochondroma yielded complete relief of symptoms. Absence of recurrence was confirmed radiographically at two years after surgery. To the best of our knowledge, this is the first report of osteochondroma of the elbow successfully treated arthroscopically.

• The Journal of the Korean bone and joint tumor society
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• v.12 no.1
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• pp.52-56
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• 2006

There are some malignant changes in multiple osteochondroma to chondrosarcoma, but secondary chondrosarcomas rarely develop in 1~2% of patients with solitary osteochondromas. Chondrosarcomas of the bones of hands and feet are rare, in comparison with their occurrence at other sites. The calcaneus was most commonly involved in the feet, but malignant transformation of solitary osteochondroma of the calcaneum to chondrosarcoma is extremely rare. We report one case of solitary calcaneal mass that grows slowly without pain from 6 years ago. He was 38 aged old man and surgical excision of the mass revealed chondrosarcoma arising from osteochondroma of the calcaneum.

• The Journal of the Korean bone and joint tumor society
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• v.11 no.1
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• pp.88-93
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• 2005

Malignant transformation of a solitary osteochondroma is rare, and usually takes form of a chondrosarcoma. We present a case of low grade osteosarcoma arising in a solitary osteochondroma of the right femur in a 30-year-old woman. As the lesion was initially continuous with corresponding components of the parent bone, so the possibilities of other diagnoses were excluded. After the initial excision, there were 3 times of recurrences during the follow up period of 3 years. The histologic subtypes of the recurred osteosarcomas were different each other, which were high grade chondroblastic, osteoblastic and fibroblastic respectively.

• Journal of Korean Foot and Ankle Society
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• v.9 no.1
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• pp.113-116
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• 2005

The osteochondroma is a cartilage-capped exostosis resulting from an error in the regulation of normal chondrocyte proliferation and maturation that leads to a normal bone growth. Although exostoses are benign lesions, they are often associated with characteristic progressive skeletal deformities and may cause clinical symptoms. Surgery can prevent progression and provide correction for certain deformities. We experienced a rare case of solitary osteochondroma in a 21-year-old male which caused the valgus deformity of the ankle.

• Journal of Dental Rehabilitation and Applied Science
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• v.30 no.1
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• pp.28-35
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• 2014

Osteochondroma is the most common benign bone tumor. The majority of osteochondromas (85%) present as solitary, nonhereditary lesions. In general, osteochondroma has no symptoms,however, facial asymmetry, malocclusion, crossbite and mouth opening can be occurred in case of temporomandibular joint involved. Radiologic analyses are indispensable element to diagnose osteochondroma and pathogenetic analysis showed that hereditary multiple osteochondromas are caused by mutations in either of two genes: exostosis(multiple)-1 (EXT1), which is located on chromosome 8q24.11 - q24.13 or exostosis(multiple)-2 (EXT2), which is located on chromosome 11p11 - 12. Recently, reduced mRNA of EXT1 was described in nonhereditary osteochondromas. The treatment of choice for osteochondroma is surgical unless the skeleton is still immature. Surgery associated with orthodontic treatment can be a valid approach to minimize facial asymmetry and malocclusion in case of temporomandibular with osteochondroma.

• The Journal of the Korean bone and joint tumor society
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• v.11 no.2
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• pp.155-159
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• 2005

Purpose: To find out the pathologic symptoms, and the incidence and clinical significance of the coexistence of internal derangement of knee(IDOK) in osteochondroma around the knee. Materials and Methods: We retrospectively reviewed forty-five patients under 20 years of age treated with the excision of the osteochondroma around the knee between 1995 and 2004. We analyzed age, gender, past history, family history, solitary or multiple osteochondroma, presenting pathologic symptoms, and causes of IDOK. Results: IDOK was confirmed in nine(20%) among the 45 cases. There were four cases of multiple osteochondromatosis, and IDOK was coexisted in one case among them. The most common presenting pathologic symptoms were painless mass of 38 cases, however 9 cases among them had joint pain for IDOK. There were 7 cases of meniscal tears and 2 of pathologic plica. Discoid meniscus was found in 4 cases among the 7 cases of meniscal tears. Conclusion: Coexistence of osteochondroma around knee and IDOK in this study probably represents a coincidence rather than a real association. However the incidence might be not low, special study and close observation should be done.

• The Journal of the Korean bone and joint tumor society
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• v.17 no.1
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• pp.17-22
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• 2011

Purpose: We analyzed the oncological outcome and prognostic factor of the chondrosarcoma arising from benign bone tumor due to malignant transformation. Materials and Methods: From April 1986 to April 2009, 18 cases were considered eligible. We analyzed retrospectively the patient's characteristics and prognostic factors that affect to the local recurrence and distant metastasis. Results: As classified by primary benign bone tumor, 4 cases were solitary osteochondroma, 11 cases were multiple osteochondromatosis and 3 cases were multiple enchondromatosis. The mean follow-up period was 85 months. The 5-year disease free survival rate of 18 patients was 85.9%. Their overall MSTS score was 25.2 (84%). There were local recurrence in 3 cases and no distant metastasis. We found that tumor location and surgical margin affected to the prognosis significantly. Conclusion: In secondary chondrosarcoma patients, the prognosis was good relatively and tumor location and surgical margin are important prognosis factor.