Walter Meohas

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Objective. To study the imaging features of patients with chronic ulcers of the leg that were associated with malignancy. Design and patients. All patients who on biopsy were proven to have malignancy – the majority of which were squamous cell carcinoma – were included in a prospective study. Ulcers limited to the foot were excluded but ulcers of the leg(More)
A 51-year-old native of Rio de Janeiro presented with bilateral synchronous Paget’s sarcomas in the tibiae, which developed in the upper right tibia and in the distal third of the left tibia. There were no other areas of Paget’s disease. The largest tumor spread to the right inguinal nodes and also soft tissue. The tumor in the left tibia spread(More)
Ewing's sarcoma is a round-cell tumor that arises most often in a medullary cavity. This neoplasm is uncommon in a subperiosteal location. We report a new case of a 12-year-old boy with a periosteal Ewing's sarcoma, located in the femur, who was treated by cortical segmental resection associated with chemotherapy. Two years after surgery the patient was(More)
BACKGROUND Liposclerosing myxofibrous primary bone tumor is a rare benign bone lesion that was characterized by complex mixture of various histological elements. METHODS We have studied the radiological, clinical and pathological features of nine patients with this disorder. Pain and limping were the main symptoms. RESULTS Radiographic images typically(More)
OBJECTIVE To relate the clinical characteristics and evaluations of patients with epithelioid sarcomas. METHODS Careful analysis of 25 epithelioid sarcoma cases registered in Instituto Nacional do Cancer between june 1987 and july 2005. RESULTS Mean age at diagnosis was 33 years old, ranged from 10 to 70. The primary site of presentation was the upper(More)
Osteosarcoma is the most common primary bone tumor in children and young adults. The median survival of osteosarcoma patients has not significantly improved since 1990, despite administration of different classes of chemotherapy agents, such as methotrexate, cisplatin and doxorubicin. Cancer stem cells (CSCs) are responsible for the resistance of(More)
OBJECTIVE Giant cell tumors are benign bone neoplasms that are relatively rare in adults and their biological behavior is still unpredictable. The incidence of local recurrence has presented variation between 0% and 65% in studies conducted worldwide, but few data are available on this complication in the Brazilian population. METHODS Information on 155(More)
The incidence of aneurysmal bone cysts is 0.14 cases per 100,000 individuals. Parosteal aneurysmal bone cysts are the least prevalent subtype and represent 7% of all aneurysmal bone cysts. We present the case of a 38-year-old male patient with pain and bulging in his right arm for eight months. He had previously been diagnosed as presenting giant-cell(More)
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