Bone Neoplasms/complications* ; Humans ; Osteosarcoma/complications* ; Pulmonary Embolism/etiology*

Telangiectatic osteosarcoma is a rare and special variant of osteogenic sarcoma with distinct radiologic, gross and microscopic features. This tumor is predominantly lytic, destructive tumor without sclerosis on roentgenogram, and is soft and cystic on gross examination. Histologically aneurysmally dilated spaces lined or traversed by stromal cells producing osteoid are noted. This report concerns a case of telangiectatic osteosarcoma occurring in a 7 years old boy. He presented with pathologic fracture of the right distal tibia, followed by a purely lytic lesion on X-ray examination. This lesion recurred five times during a span of one year. Microscopic features of the biopsy specimen was difficult to differentiate from aneurysmal bone cyst because of prominant blood-filled cyst formation. It was finally identified as osteosarcoma from the below-knee amputation specimen through the close examination for anaplastic osteoid-producing stromal cells in the septa that separate the blood cysts.
Aneurysm/complications/diagnosis ; Child ; Diagnosis, Differential ; Humans ; Male ; Neoplasm Recurrence, Local ; Osteosarcoma/complications/*pathology ; Tibia

Humans ; Male ; Osteosarcoma ; complications ; diagnostic imaging ; surgery ; Ultrasonography ; Wounds and Injuries ; complications ; Young Adult

OBJECTIVETo demonstrate the influence of pathologic fracture and the form of surgical therapy on the survival rate and the prognosis of the patients with osteosarcoma.

METHODSFrom 1992 to 2001 retrospective analysis was done for 22 patients with pathological fracture out of 189 patients with primary extremity osteosarcoma. The 22 patients presented as primary extremity osteosarcoma with pathologic fracture without prior treatment. They were 7 females and 15 males and their age ranged from 8 to 36 years old. Most of diseases located in humerus and femurs. Limb salvage underwent in 12 patients (allograft 2, bone cement spacer 4, local resection 1, prosthesis 4 and rotation-plasty 1) and amputation in 10. All these patients had pre and post operative chemotherapy. The 22 patients followed 8 to 146 months after surgery, and the average was 54.7 months. The minimum follow-up for survive patient was 36 months.

RESULTSThe 54.5% patients had limb-salvage surgery and 45.5% had amputation, and the limb salvage was lower than non-fracture patients (71.9%), but without significance (P = 0.096). Nine patients developed lung metastases and died in 8 to 26 months postoperatively. The five-year estimated survival rate was 53.4%. The recurrent rates were 16.7% and 10.0% in limb salvages and amputation respectively. The lung metastases rates were 25% and 60% in limb salvages and amputation respectively.

CONCLUSIONThe performance of a limb-salvage procedure in carefully selected patients with pathologic fracture does not significantly increase the risk of local recurrence or death.

Adolescent ; Adult ; Amputation ; Child ; Female ; Follow-Up Studies ; Fractures, Spontaneous ; etiology ; Humans ; Limb Salvage ; Male ; Osteosarcoma ; complications ; diagnosis ; drug therapy ; surgery ; Prognosis ; Retrospective Studies ; Survival Rate ; Treatment Outcome

PURPOSE: We evaluated the results of allograft reconstruction following wide resection of malignant bone tumors in long bone, retrospectively. MATERIALS AND METHODS: Seven patients were included. The mean age was 44 years old. Male was 4 cases, and female was 3 cases. Mean follow-up period was 38 months. The mean Musculoskeletal Tumor Society (MSTS) score at final follow-up was evaluated. Postoperative complications were evaluated via periodic radiologic follow-up. Oncologic results were analyzed at final follow-up. RESULTS: The primary malignancies occurred at femur in 5 cases, humerus in 1 case and tibia in 1 case. Pathologic diagnoses were osteosarcoma in 4 cases, multiple myeloma in 2 cases and adamantinoma in 1 case. Mean length of allograft was 165 mm. Fixations of allograft were intramedullary nailing with additional plate in 4 cases, intramedullary nailing in 2 cases, and screw fixation in 1 case. Mean time to union was 14.5 weeks. Mean MSTS score at final follow-up was 20 (67%). Postoperative complications were nonunion in 3 cases, implant failure in 1 case, and infection in 1 case. Oncologic outcomes were continuous disease free in 5 cases and alive with disease in 2 cases at final follow-up. Autologous bone graft and hemi-cortical onlay graft were performed in 2 cases of nonunion. CONCLUSION: Allograft reconstruction following wide resection of malignant bone tumors in long bone was effective surgical option. However, the possibility of nonunion between host bone and allograft should be considered.
Adamantinoma ; Allografts* ; Diagnosis ; Female ; Femur ; Follow-Up Studies ; Fracture Fixation, Intramedullary ; Humans ; Humerus ; Inlays ; Male ; Multiple Myeloma ; Osteosarcoma ; Postoperative Complications ; Retrospective Studies ; Tibia ; Transplants

BACKGROUNDRecent studies have suggested that the presence of a pathological fracture does not impact on oncologic outcomes and the feasibility of limb salvage surgery (LSS) in appropriately selected patients when combined with neoadjuvant chemotherapy. These have largely been single institutional studies with limited numbers. The Eastern Asian Musculoskeletal Oncology Group reviewed the data from three large volume Asian orthopedic oncology centers to determine whether the presence of a pathologic fracture affected outcomes in osteosarcoma patients.

METHODSA retrospective review of the data was conducted. Ninety-five cases of nonmetastatic extremity osteosarcoma with a pathological fracture and 887 cases without fracture treated during the same period were compared.

RESULTSIn the fracture group, the LSS rate was 62.1%, and the rate of amputation was 37.9%. In the nonfracture group, the LSS rate was 74.7%, and the amputation was 25.3%. In patients with a pathologic fracture, the rate of local recurrence for LSS and amputation groups was 8.5% and 2.8%, respectively. In this group, the 5-year survival in the LSS group was 66% as against. 46.8% in the amputation group.

CONCLUSIONSOur study suggests that surgically treated patients with pathologic fractures in osteosarcoma have adequate local control and do not have a poorer outcome compared to patients without a fracture. Though osteosarcoma with a pathologic fracture is not a contraindication for limb salvage, appropriate case selection is important when deciding local control options to ensure adequate oncologic clearance.

Adolescent ; Adult ; Aged ; Bone Neoplasms ; complications ; surgery ; Child ; Child, Preschool ; Extremities ; pathology ; surgery ; Female ; Fractures, Spontaneous ; etiology ; surgery ; Humans ; Limb Salvage ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; complications ; surgery ; Osteosarcoma ; complications ; surgery ; Retrospective Studies ; Young Adult

OBJECTIVETo study the analgesic effect of shentong zhuyu decoction (SZD) and its effect on the expression of the spinal cord glial fibrillary acidic protein (GFAP).

METHODSOne hundred C3H/HeNCrlVr male mice were randomly divided into the normal group (n=8), the sham operation group (n=30), the model group (n=30), the Chinese medicine (CM) group 1 (n=8), the CM group 2 (n=8), the CM group 3 (n=8), and the vehicle group (n=8). 0.1 g crude drug of SZD/0.4 mL, 0.3 g crude drug of SZD/0.4 mL, 0.9 g crude drug of SZD/0.4 mL, and 0.4 mL normal saline were respectively given by gastrogavage to mice in CM 1, 2, 3 groups and the vehicle group, once daily for seven days starting from Day 14. The paw withdrawal thermal latency (PWTL), as the behavior indicator, was assessed in mice using radiant thermal stimulator. The lumbar enlargement of the spinal cord was taken after the behavioral test on Day 21. GFAP mRNA and protein expressions were detected using real-time quantitative RT-PCR and Western blot.

RESULTSCompared with the normal group (Day 0) (PWTL: 15.91 +/- 1.65 s) and the sham operation group (PWTL: Day 4: 13.33 +/- 1.44 s; Day 7: 11.28 +/- 0.61 s; Day 10: 15.47 +/- 2.46 s; Day 14: 15.69 +/- 1.98 s; Day 21: 15.69 +/- 1.68 s), the PWTL value in the model group (Day 4: 13.24 +/- 1.02 s; Day 7: 11.30 +/- 1.09 s; Day 10: 9.12 +/- 0.54 s; Day 14: 7.79 +/- 0.77 s; Day 21: 6.36 +/- 0.59 s) progressively decreased (P < 0.05) as time went by, while the spinal cord GFAP mRNA and protein expressions gradually increased. Compared with the normal group (Day 0) and the sham operation group (Day 14), the PWTL value in the CM groups and the vehicle group obviously decreased on Day 14 (P < 0.05). The PWTL value was not significantly different among the model group, CM groups, and the vehicle group on Day 14 (P > 0.05). On Day 21 the PWTL value of CM group 2 and 3 increased and the spinal cord GFAP mRNA and protein expression levels decreased when compared with the model group and the vehicle group (P < 0.05). But no significant difference in the PWTL value or GFAP expression levels was shown among the CM 1 group, the vehicle group, and the model group (P > 0.05).

CONCLUSIONSZD had analgesic effect. Inhibition of the proliferation and activation of the spinal cord astrocytes might be one of its mechanisms.

Animals ; Astrocytes ; cytology ; drug effects ; metabolism ; Bone Neoplasms ; complications ; psychology ; Drugs, Chinese Herbal ; pharmacology ; Glial Fibrillary Acidic Protein ; metabolism ; Male ; Mice ; Mice, Inbred C3H ; Osteosarcoma ; complications ; psychology ; Pain ; etiology ; metabolism ; Spinal Cord ; cytology ; metabolism

It has been well known that the survivors of retinoblastoma are prone to have osteosarcoma. But the secondary tumor usually occurs in bilateral, hereditary type of retinoblastoma. We report one case of osteosarcoma in a survivor of unilateral, sporadic retinoblastoma. A fourteen year old male presented with a painfully swollen distal forearm of 2 month duration. He had enucleated his left eye 10 years ago due to retinoblastoma with no other adjuvant therapy. We managed him with our conventional protocol and identified deletion of Rb gene from his pathological specimen by using the PCR-RFLP method. This result is unusual for unilateral nonhereditable retinoblastoma and may suggest gene level change even in sporadic cases. And Rb gene study may be helpful for unilateral, sporadic retinoblastoma patient in detecting the possibility of late osteosarcoma.
Adolescent ; Base Sequence ; Case Report ; DNA Primers ; *Gene Deletion ; *Genes, Retinoblastoma ; Human ; Magnetic Resonance Imaging ; Male ; Molecular Sequence Data ; Osteosarcoma/complications/*genetics/pathology ; Retinoblastoma/complications/*genetics/pathology ; Support, Non-U.S. Gov't ; Survivors

Any medical diagnosis should take a multimodal approach, especially those involving tumour-like conditions, as entities that mimic neoplasms have overlapping features and may present detrimental outcomes if they are underdiagnosed. These case reports present diagnostic pitfalls resulting from overdependence on a single diagnostic parameter for three musculoskeletal neoplasm mimics: brown tumour (BT) that was mistaken for giant cell tumour (GCT), methicillin-resistant Staphylococcus aureus osteomyelitis mistaken for osteosarcoma and a pseudoaneurysm mistaken for a soft tissue sarcoma. Literature reviews revealed five reports of BT simulating GCT, four reports of osteomyelitis mimicking osteosarcoma and five reports of a pseudoaneurysm imitating a soft tissue sarcoma. Our findings highlight the therapeutic dilemmas that arise with musculoskeletal mimics, as well as the importance of thorough investigation to distinguish mimickers from true neoplasms.
Adult ; Aneurysm, False ; diagnosis ; Biopsy ; Bone Diseases ; diagnosis ; Bone Diseases, Metabolic ; diagnosis ; Bone Neoplasms ; diagnosis ; Cell Proliferation ; Diagnosis, Differential ; Diagnostic Errors ; prevention & control ; Female ; Giant Cell Tumors ; diagnosis ; Humans ; Hyperparathyroidism ; complications ; Leukocytosis ; diagnosis ; Male ; Methicillin-Resistant Staphylococcus aureus ; Middle Aged ; Neoplasms ; diagnosis ; microbiology ; Osteomyelitis ; diagnosis ; microbiology ; Osteosarcoma ; diagnosis ; Sarcoma ; diagnosis ; Soft Tissue Neoplasms ; diagnosis ; Tibia ; pathology