Sarcomas are malignant tumors of mesenchymal origin. They comprise < 1% adult malignancies and about 15-20% pediatric malignancies. These subdivided into bone cartilage sarcomas soft tissue type. the maxillofacial region 5-10% all this part body. Usually do not originate from benign tumors. Among factors known to induce sarcoma growth are: genetic defects, exposure pesticides herbicides, ionizi...

Mature teratoma is a benign germ cell tumor rarely located in the temporal bone. We are reporting a case of a mature teratoma of the temporal bone in a healthy borne 3.5-month-old baby girl with a 2-day suggestive history of otitis media and polypoidal mass expulsing from the external auditory canal of the left ear. A definitive diagnosis is made after complete excision and histological examina...

INTRODUCTION Giant cell tumor of the bone is a relatively uncommon tumor. It is characterized by the presence of multinucleated giant cells. The tumor is usually regarded as benign. In most patients, giant cell tumors have an indolent course, but tumors recur locally in as many as 50% of cases. Metastasis to the lungs may occur. Cooper first reported giant cell tumors in the 18th century. In 19...

aggressive osteoblastoma (ao) is a benign osteoblastic tumor which is rare in the head and neck region. clinical and histological features are therefore overlap with other benign and low-grade malignant tumors. the aim of this article is to report and discuss the differential diagnosis of an aggressive osteoblastoma in the mandible. a 25-year-old male patient reported with pain and asymmetry on...

Calcifying epithelial odontogenic tumor is a benign neoplasm, but its local destructive potential may lead to the formation of major bone defects. Microscopically, there are some histological variants. Among them, we highlight the clear cell variant due to its more aggressive behavior and a higher incidence of relapse. In this context, it is pertinent to describe the clear cell variant of calci...

Osteoid osteoma is type of benign bone tumor, characterized by a well-demarcated core with a typical size of <1 cm and by a distinctive surrounding zone of reactive bone formation. The tumor can occur anywhere in the cortex or medulla of the skeleton. However, the lesion usually affects the long bones of the lower extremities. The present study describes two cases of osteoid osteomas located in...

Osteoid osteoma is a benign bone tumor and accounts for 10% of benign tumors. Almost any bones can be involved but half of cases involving femur or tibia. Osteoid osteoma is a rare tumor of the scapula with only 18 reported cases in the literature. We presented a case of osteoid osteoma of the scapula in right shoulder in angle of coracoid and geloneid in a 34- year old woman. She had right rad...

Giant cell tumor (GCT) of bone is a locally aggressive benign neoplasm that is associated with a large biological spectrum ranging from latent benign to highly recurrent and occasionally metastatic malignant bone tumor. It accounts for 4-10% of all bone tumors and typically affects the meta-epiphyseal region of long bones of young adults. The most common site involved is the distal femur, follo...

Serum sialic acid and total hexosamine values were remarkably elevated in the patients with malignant bone tumor and/or metastasis, in general, but in the great number of the patients with benign bone tumor both these levels remained within the normal range. Whereas, there were some cases with malignant bone tumor showing normal values in both serum sialic acid and total hexosamine levels, but ...