BACKGROUND Malignant transformation of giant cell tumors of bones, that is, secondary malignant giant cell tumor of bone, is rare. The most common symptoms are local pain and swelling. There are no prior reports of giant cell tumor of bone with fever of unknown origin at the onset. Here we present a case of a secondary malignant giant cell tumor of bone due to malignant transformation 40 years ...

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...

Background: Few studies regarding oral lesions of children and adolescents were reported in the medical literature. The aim of this study was to determine the frequency of these lesions in patients from birth to 20 years old in Babol, Northern Iran.Methods: The slides of all cases of oral lesions in children and adolescents, between 1990 and 2012 were obtained from the pathology archives of Sha...

embolization. The search on aneurysmal bone cyst and selective Study Design. Clinically based systematic review. Objective. To determine the role of (A) medical treatment and (B) interventional radiology as either adjuvant or stand-alone treatment in primary benign bone tumors of the spine. Methods. A multidisciplinary panel of spine surgeons, radiation oncologists, and medical oncologists elab...

Juvenile xanthogranuloma (JXG) is an uncommon histiocytic cutaneous lesion. It is a type of non-Langerhans cell histiocytosis(WHO Class IIb). The mean age of onset is 2 years of age. The adult form of JXG is relatively rare. The most common affectedarea is the face or the scalp and most of the lesions are less than 5 mm in diameter. This lesion tends to show a self-limited course over several m...

Giant cell-rich osteosarcoma is an extremely rare variant of conventional osteosarcoma. It accounts for only 1%-3%. undifferentiated high-grade sarcoma with numerous osteoclast-like giant cells. also contains variable amount tumor osteoid. This article aims to present a case involving the right knee joint in young man.

cancer immunotherapy (passive or active) involves treatments which promote the ability of the immune system to fight tumor cells. several types of immunotherapeutic agents, such as monoclonal antibodies, immune checkpoint inhibitors, non-specific immunomodulatory agents, and cancer vaccines are currently under intensive investigation in preclinical and clinical trials. cancer vaccines induce pe...