osteosarcoma is a primary malignant tumor of bone, which can involve jaws. this article reviews osteosarcoma of the jaws referred to the department of oral pathology, dental faculty of tehran university of medical sicences and pathology department of cancer institiute in imam khomeini hospital during 30 years from 1349 to 1378 and also reviews jaw osteosarcoma in english literature. the purpose...

primary bone tumors are the sixth most common neoplasm occurring in children and constitute approximately 6% of all childhood malignancies with a peak incidence in 15- to 19-year- old individuals. these lesions are the third most common tumors in adolescents and young adults (exceeded only by leukemia and lymphoma) common complaints are intermittent to constant mild to severe pain, constitution...

the majority of osseous tumors of the hand are benign. the surgeon who evaluates and treats osseous tumors of the hand has to be familiar with limb anatomy, tumor biology, various presentations of the tumors and the range of treatment possibilities and their limitations. lesions in the hand more often present earlier in their course than those at other sites, just because they are more likely t...

The malignant transformation of conventional giant cell tumor of bone (GCTOB) is rare and usually occurs with irradiation. Here we report two neglected cases of conventional GCTOB with spontaneous malignant transformation at 11 and 16 years after initial diagnosis. In the former case, the patient refused to receive any treatment following the incisional biopsy, and in the latter, the firs...

malignant fibrous histiocytoma (mfh) is the most common soft tissue sarcoma of late adult life and may also arise as a primary tumor in bone. it is a rare condition that constitutes less than 1% of the malignant tumors of bone and commonly occurs in the mathaphysis of long bones of extremities such as the femur and tibia. the occurrence in the head and neck region is very rare. mfh of the jaws ...

background : meningiomas are common benign tumors of the central nervous system. patients with meningiomas achieve postoperative optimal functional recovery, but there is a probability of tumor recurrence months or years after surgical resection. this study aims to evaluate the prevalence of recurrent meningioma and the correlation between tumor recurrence and certain factors. materials and met...

introduction: different imaging modalities are used to evaluate salivary gland diseases, including tumors. ultrasonography (us) is the preferred method on account of its ease of use, affordability, safety profile, and good tolerance among patients. the aim of this study was to evaluate the role of us in differentiating malignant from benign parotid tumors, in the context of previous controversy...

The solitaryplasmocytomais a rare tumor, made of malignant plasma cellsfound on single bone, withoutsystemicproliferation, We report two cases chronicpolyradiculoneuropathyrevealing solitaryplasmocytoma.

we report occurrence of a rare case of giant cell tumor (gct), in a 28-year old woman, arising from anterior arc of right 6 th rib during pregnancy. it progressed rapidly during breast-feeding period, mimicking malignant bone tumor at delayed presentation.

  Background and Objectives: Giant cell Tumor of bone (GCT) is often regarded as a benign tumor, but its clinical course is unpredictable, has a high rate of recurrence, and even can metastases and transform to a malignant tumor. Histological features of the tumor often could not predict its future biologic behavior, so it is just called ''Giant cell tumor'' without indicating maligna...