Osteochondroma is the most common form of benign bone tumors. Chondrosarcoma a rare malignant tumor that may be primary or secondary. We report case 19-year-old man with low grade chondrosarcoma secondary to transformation osteochondroma right distal femur. Here we discuss osteochondroma, chances malignancy chondrosarcoma, work up done in our case, histopathological features differentiate from ...

  Background: Massive bone allograft is an option in cases of limb preservation and reconstruction after massive benign and malignant bone tumor resection. The purpose of this study was to analyze the outcome of these procedures at Imam Reza Hospital, Mashhad University of Medical Sciences. Methods: In this study, 113 cases have been presented. Eleven cases were excluded (patients has a traumat...

Malignant transformation of conventional giant cell tumor of bone is rare and usually occurs with irradiation. This article describes a case of malignant transformation of a giant cell tumor 15 years after initial curettage and bone graft. A 35-year-old man was admitted to the hospital with a recurrent giant cell tumor of the distal femur. On presentation, the patient reported the insidious ons...

The learning objectives of this review article are to identify benign vs. malignant criteria in bone tumor diagnosis and also to differentiate the types of bone tumors and their characterization. Based on the Lodwick classification an overview of the three main types of bone destruction patterns visible on radiographs will be given with many examples. Typical examples of benign and malignant bo...

Epithelioid hemangioendothelioma (EHE) is a rare tumor of the vascular origin. It was first described in its pulmonary form by Dail and Leibow in 1975 and named "intravascular bronchioalveolar tumor" (IVBAT). Since then, reports of occurrences of the tumor have been made for number of locations, but most often tumor can be found in soft tissues, liver, lungs, bone and skin. It is considered to ...

different types of actinomyces spp isolated from the oral cavity of human in healthy as well as in pathological state. internally it is only found in association with pathological organs. recently actinomyces naeslundii has been isolated from blood culture of a leukemic patient. present studies indicate the association of this microorganism with cells obtained from bone marrow by punction in mo...

The treatment of malignant tumors of the pelvic bone has been considered difficult. Many authors have reported lower rates of patients survival and high rates of complications after treatment of the malignant bone tumors of the pelvis. The size of the tumors often much greater than in other sites. Surgical resection and reconstruction often are more complex, based on the proximity of neurovascu...

Malignant bone tumors of the chest wall and sternum are more rare because most bone tumors occur in the long bones or joints.Osteosarcoma (OS) is a malignant bone tumor that occurs in the second or third decade of life. The men/women ratio is about 3:2 and half of the tumors occur near the knee. The most commonly occurring malignant tumor in sternum is chondrosarcoma and occurrence of osteosarc...

primitive neuroectodermal tumor (penets) is an uncommon malignancy of bone and soft tissue witch rarely occurs in the kidney. in more than 90% of the cases, the tumor cells relieves a balanced translocation (11; 22) (q24; q12). immunohistochemical staining may be required for diagnosis of penet. the cells of tumor express cd99, vimentin, nse, fl1 but do not express ck, lca, myogenin, and wt1. w...

Solid tumors are abnormal tissues containing tumor and non-tumor cells, also known as tumor stromal cells. However, the malignant potential of tumor stromal cells remains largely unknown. The aim of the present study was to investigate the malignant potential of host bone marrow‑derived stroma cells in transplanted subcutaneous tumors of the glioma stem/progenitor cells (GSPCs) labeled using th...