Osteosarcoma can be defined as a malignant tumor of bone in which malignant mesenchymal tumor cells have the ability to produce osteoid or immature bone. There may be profuse osteoid matrix production and extensive minealization throughout the tumor, or both may be minimal in extent and very focally distributed. The osteoblastic nature of the tumor can be easy to identify both radiographically ...

Osteoid osteoma is a benign bone tumor that rarely affects the carpal bones. Because of its nonspecific presentation in the wrist, it remains a diagnostic challenge. We report an unusual case of osteoid osteoma in the capitate where the diagnosis was delayed and the presentation was that of an aggressive natured lesion with considerable functional incapacitation. Diagnosis was made by computed ...

Osteomalacia is one of the most common osteometabolic diseases among the elderly and may be associated with osteoporosis. It is typically caused by lack of vitamin D and is characterized by mineralization deficiency of the osteoid matrix in the cortical and trabecular bone, resulting in accumulation of osteoid tissue. Vitamin D deficiency is a pathogenic factor of osteoporosis that can be modif...

Osteoid osteomas are benign skeletal neoplasms that are commonly encountered in the bones of the lower extremities, but are exceedingly rare in jaw bones with a prevalence of less than 1%. This unique clinical entity is usually seen in younger individuals, with nocturnal pain and swelling as its characteristic clinical manifestations. The size of the lesion is rarely found to be more than 2 cm....

OBJECTIVE To report the results of computed tomography (CT)-guided percutaneous resection of the nidus in 18 cases of osteoid osteoma. MATERIALS AND METHODS The medical records of 18 cases of osteoid osteoma in children, adolescents and young adults, who underwent CT-guided removal of the nidus between November, 2004 and March, 2009 were reviewed retrospectively for demographic data, lesion s...