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Surgical Treatment for Pathologic Fracture of Skeletal Metastatic Lesion of the Proximal Femur: Comparison of Clinical Outcomes for Prosthetic Joint Replacement and Osteosynthetic Fixation.

Duk Seop SHIN ; Ui Sik KIM ; Hae jun KWAK ; Young Jin KO

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):44-50. doi:10.5292/jkbjts.2011.17.1.44

PURPOSE: To compare clinical outcomes of the tumor prosthetic replacement and osteosynthetic fixation for pathologic fracture of skeletal metastatic lesion of the proximal femur. MATERIALS AND METHODS: From 1994 May to 2009 May, medical records of 22 patients who underwent tumor prosthetic replacement with tumor resection (group 1) and 15 others (16 hips) who underwent osteosynthetic fixation without tumor resection (group 2) were reviewed. The mean age of overall patients were 59 (group 1) and 60 (group 2). Mean follow up periods were 23 and 11 months. The oncological and functional results were evaluated with Kaplan-Meier methods and Musculoskeletal Tumor Society (MSTS) scoring system, 1993. The statistical evaluation was assessed with Log rank test and t-test. RESULTS: The mean survival periods were 24 months in group 1 and 11months in group 2. The 1 year survival rates were 86% in group 1 and 50 % in group 2, and 2 year survival rates were 29.7% in group 1 and 9.4% in group 2. The mean MSTS functional score were 26.4 (19-30), 87.9% in group 1 and 15.3 (10-23), 51.0% in group 2. CONCLUSION: The results of tumor resection and prosthetic replacement in selected cases was better than osteosynthetic fixation without tumor resection for metastatic bone tumors around proximal femur in oncological and functional aspects.
Femur ; Follow-Up Studies ; Fractures, Spontaneous ; Humans ; Joints ; Medical Records ; Survival Rate

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Functional and Radiological Results of Intermediate-term Follow Up in MUTARS(R) Tumor Endoprostheses.

Dong Joon KANG ; Jeung Il KIM ; Jong Seok OH ; Tae Yong MOON ; In Sook LEE

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):36-43. doi:10.5292/jkbjts.2011.17.1.36

PURPOSE: This study was designed to verify intermediate-term functional and radiological results of limb salvage operation using endoprosthetic replacement system (MUTARS(R)) used in patients with a malignant bone tumor. MATERIALS AND METHODS: Thirty one cases which used MUTARS(R) tumor prosthesis were reviewed. The mean age of the patients was 49.2 years and the mean follow up was 39.8 months. We retrospectively reviewed complications, and evaluated functionally and radiologically by Enneking functional score, ISOLS radiological implants evaluation system at last follow-up. RESULTS: 3 patients had died of disease, distant metastasis was seen in 4 patients and local recurrence was seen in 1 patients. Complications were developed in 12 patients. (infection 6, leg length discrepancy 2, aseptic loosening 2, periprosthetic femoral fracture 1, screw loosening 1) Mean value of total functional scores were 81.2% in proximal femur, 77.4% in distal femur, 78.1% in proximal tibia, and 80.2% in proximal humerus. The overall radiological result was relatively satisfactory. CONCLUSION: Our results suggest limb salvage with the MUTARS(R) endoprosthesis is successful with good functional and radiological results. But we should be careful with complications such as infection.
Extremities ; Femoral Fractures ; Femur ; Follow-Up Studies ; Humans ; Humerus ; Leg ; Limb Salvage ; Neoplasm Metastasis ; Prostheses and Implants ; Recurrence ; Retrospective Studies ; Tibia

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Analysis of Treatment Results of Malignant Melanoma.

Duk Seop SHIN ; Ui Sik KIM

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):30-35. doi:10.5292/jkbjts.2011.17.1.30

PURPOSE: This study was designed to evaluate the treatment results of malignant melanoma and to analyze the factors influencing prognosis. MATERIALS AND METHODS: Thirty one cases of malignant melanoma were included in this study. They were treated in our hospital surgically, medically and immunologically from January 1996 to December 2005, and were followed more than 5 years. We compared 5 year survival rate (5YSR) according to the age, gender, anatomical site, depth of tumor, TNM stage, involvement of lymph node and immuno-chemotherapy. RESULTS: Overall 5YSR was 80.6%. 5YSR of the age group below 65 years was 89.7% and 66.7% for the age group over 65 (p=0.033). 5YSR for men was 75% and 90.9% for women. 5YSR according to the site of occurrence showed 66.7% in upper extremities, 89.5% in lower extremities, and 66.7% in other site. 5YSR was 100% for the Clark level below III and 62.5% for the level above IV (p=0.032). 5YSR was 53.8% for lymph node metastasis group and 100% for non-lymph node metastasis group (p=0.021). CONCLUSION: We concluded that early diagnosis and wide excision was the most important in treatment of malignant melanoma. The prognostic fractors of malignant melanoma were age, depth of tumor (Clark's stage) and metastasis of lymph node.
Early Diagnosis ; Female ; Humans ; Lower Extremity ; Lymph Nodes ; Male ; Melanoma ; Neoplasm Metastasis ; Survival Rate ; Upper Extremity

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Over-expression of PTEN Involved in Troglitazone-induced Apoptosis in Human Osteosarcoma Cells.

Sun Jung YOON ; Lu ZHOU ; Jung Ryul KIM

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):23-29. doi:10.5292/jkbjts.2011.17.1.23

PURPOSE: We investigated the effects of phosphatase and tensin homologue deleted on chromosome 10 gene phosphatase and tensin homologue deleted on chromosome 10 gene (PTEN) expression on the cell proliferation and on the responsiveness of troglitazone in osteosarcoma cells. MATERIALS AND METHODS: Western blotting alnalysis was performed to detect the expression of PTEN in U-2OS cells treated with troglitazone. WST (water-soluble tetrazolium) assay was used to evaluate cell proliferation. Flow cytometry was used to determine cell apoptosis. Further, transfection of wild-type PTEN plasmid DNA was used to upregulate PTEN expression. RESULTS: Troglitazone treatment induced growth inhibition of U2-OS cells in a dose- and time-dependent manner. Troglitazone increased the expression of PTEN in a dose-dependent manner. PTEN upregulation induced by troglitazone treatment resulted in cell growth inhibition and apoptosis in U-2OS cells. PTEN over-expression by plasmid transfection enhanced these effects of troglitazone. Moreover, no changes were observed in the mutant type-PTEN group. CONCLUSION: Upregulation of PTEN is involved in the inhibition of cell growth and induction of cell apoptosis by troglitazone. Further, PTEN over-expression can cause cell growth inhibition in osteosarcoma cells and these cell growth inhibitions could be enhance by troglitazone treatment.
Apoptosis ; Blotting, Western ; Cell Proliferation ; Chromans ; Chromosomes, Human, Pair 10 ; DNA ; Flow Cytometry ; Humans ; Microfilament Proteins ; Osteosarcoma ; Plasmids ; Thiazolidinediones ; Transfection ; Up-Regulation

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Chondrosarcoma Arising from Benign Bone Tumor due to Malignant Transformation.

Wan hyeong CHO ; Won Seok SONG ; Chang Bae KONG ; Yun Suk HONG ; Jung Dong LEE ; Dae Geun JEON

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):17-22. doi:10.5292/jkbjts.2011.17.1.17

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.
Chondrosarcoma ; Disease-Free Survival ; Enchondromatosis ; Follow-Up Studies ; Humans ; Neoplasm Metastasis ; Osteochondroma ; Osteochondromatosis ; Prognosis ; Recurrence ; Retrospective Studies

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The Alignment and Deformity of the Upper Extremity in Hereditary Multiple Exostoses.

Young Woo CHUNG ; Gi Heon PARK ; Hyeong Won PARK ; Sung Taek JUNG

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):11-16. doi:10.5292/jkbjts.2011.17.1.11

PURPOSE: This study was aimed to analyze the incidence and the anatomical distributions of HME (Hereditary Multiple Exostoses) on upper limbs and its related change in alignment of the upper limbs in HME patients. MATERIALS AND METHODS: Thirty eight patients who had been diagnosed HME between 2001 and 2009, were categorized into two groups; (1) group A (1-2 involvements); (2) group B (> or =3 involvements). We checked the carrying angle, VAS (Visual Analogue Scale), limitations in daily activities, cosmetic satisfaction according to the number of exostoses invasion. RESULTS: Among the 38 patients, 23 patients (43 cases) had exostoses in the upper limbs. The locations of exostoses in the upper limbs were proximal humerus in 33 cases (30%), distal ulna in 31 cases (28.2%), and distal radius in 24 cases (21.8%). The carrying angle of group A and B was 10.7degrees, 13.8degrees, VAS was 1.3, 3.5, and the limitations in daily activities was 7.3, 6.6 of 8 points. The cosmetic satisfactory cases were 13 and 10 cases, respectively. CONCLUSION: The deformity in upper limbs was observed in 65% of the HME patients. As the number of invasion increases, carrying angle and VAS were increased but limitations in daily activities and cosmetic satisfaction were decreased.
Congenital Abnormalities ; Cosmetics ; Exostoses ; Exostoses, Multiple Hereditary ; Humans ; Humerus ; Incidence ; Lifting ; Radius ; Ulna ; Upper Extremity

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Growth Expectation in Children: Leg Length Discrepancy Related with Bone Tumor in Children.

Sung Taek JUNG ; Kwang Cheul JEONG ; Hyeong Won PARK

The Journal of the Korean Bone and Joint Tumor Society.2011;17(1):1-10. doi:10.5292/jkbjts.2011.17.1.1

The main goals of treatment of malignant bone tumor are the prolongation of life survival and the improvement of quality of life. In growing children, however, leg length discrepancy (LLD) is one of major problem in the treatment of malignant bone tumors. Therefore, the precise understanding of growth in children is essential, and the prediction of LLD is critical in deciding the time and options of surgery. In addition, to use the adequate method of growth expectation, periodic follow-up and collaboration with patient's parents are needed.
Child ; Cooperative Behavior ; Humans ; Leg ; Life Support Care ; Parents ; Quality of Life

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Repeated Unplanned Excision of Malignant Fibrous Histiocytoma (Malignant Fibrous Histiocytoma Misdiagnosed as the Simple Cyst): A Case Report.

Jae Wan SOH ; Woo Jong KIM ; Chang Hyun KIM ; Sei Won KWON ; Han Jo KIM

The Journal of the Korean Bone and Joint Tumor Society.2012;18(2):113-117. doi:10.5292/jkbjts.2012.18.2.113

A 73-year-old male was admitted for unhealed wound. Eight months ago, the patient had been operated for excision of soft tissue mass on left distal thigh area in previous hospital and after 4 months from first operation, had been reoperated because of recurrence. The pathologic diagnosis of previous operation was simple cyst. In operating finding, the mass invaded the vastus lateralis fascia and had irregular margin and adhesion. We carried out simple excision with retaining 5 cm of free margin from the mass. The pathologic diagnosis of our hospital was malignant fibrous histiocytoma, and then the patient was performed radiation therapy. In 1 year follow-up, there was no significant finding either increasing mass size or metastasis. We misdiagnosed as simple cyst and then performed simple excision, however finally pathologic diagnosis confirmed as malignant fibrous histiocytoma. It is considered to operate a mass that preoperative proper evaluation and diagnosis are required.
Fascia ; Follow-Up Studies ; Histiocytoma, Benign Fibrous ; Histiocytoma, Malignant Fibrous ; Humans ; Male ; Neoplasm Metastasis ; Quadriceps Muscle ; Recurrence ; Thigh

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Huge Turret Exostosis of Metacarpus: A Case Report.

Shin Taek KANG ; Tae Hyung KIM ; Hyun Woo KIM

The Journal of the Korean Bone and Joint Tumor Society.2012;18(2):109-112. doi:10.5292/jkbjts.2012.18.2.109

A turret exostosis was known a smooth, dome-shaped extracortical collection of subperiosteal bone beneath the extensor apparatus. In most cases, turret exostosis involve middle and distal phalanges compared with involving metacarpal cases have been rarely reported in the literature.
Exostoses ; Metacarpus

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Giant Synovial Chondromatosis of the Knee Mimicking a Parosteal Osteosarcoma: A Case Report.

Chang Ho KANG ; Jong Hoon PARK ; Dae Hee LEE ; Chul Hwan KIM ; Jeong Mi PARK ; Won Seok LEE

The Journal of the Korean Bone and Joint Tumor Society.2010;16(2):95-98. doi:10.5292/jkbjts.2010.16.2.95

Synovial chondromatosis is a benign nodular cartilaginous proliferation arising in the synovium of joints. The radiolographic features of this condition are variable. Rarely, it would be confused with malignancy such as chondrosarcoma, osteosarcoma or synovial sarcoma. We report a case of primary synovial chondromatosis of the posterior aspect of the proximal tibia mimicking a parosteal osteoarcoma on the radiography, which showed a homogeneously radiopaque juxtacortical mass. However, subsequent computed tomography (CT) showed multiple intra-articular masses containing chondroid mineralization, suggesting synovial chondromatosis.
Chondromatosis, Synovial ; Chondrosarcoma ; Diagnostic Imaging ; Joints ; Knee ; Osteosarcoma ; Sarcoma, Synovial ; Synovial Membrane ; Tibia

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