Comparative analysis between osteosarcoma and Ewing's sarcoma: evaluation of the time from onset of signs and symptoms until diagnosis.

Objective: The purposes of this study were to describe the early signs and symptoms of osteosarcoma and Ewing's sarcoma, identify symptoms that could be used to help differentiate the two types of tumors, and determine the time elapsed between the onset of signs and symptoms and the definitive diagnosis in our service, providing information and imputus for earlier diagnosis of these tumors.

Methods: A retrospective analysis of the medical dossiers of 365 patients under 30 years of age diagnosed with osteosarcoma or Ewing's sarcoma was performed, and the aspects of the clinical diagnosis were statistically analyzed and compared.

Results: The time between the onset of signs and the symptoms was 5.

Parosteal osteosarcoma with myocardial metastasis 13 years after follow-up.

Purpose: To report the case of a woman with a diagnosis of grade II (low grade) parosteal osteosarcoma with the occurrence of myocardial metastasis 13 years after resection, and to present a review of the existing literature on the subject.

Methods: Description of the case and review of the literature.

Conclusion: The review leads to the conclusion that the occurrence of metastasis from parosteal osteosarcoma can occur in up to 38% of the cases, in spite of its relatively low aggressiveness.

Retroperitoneoscopic adrenalectomy in an infant with adrenocortical virilizing tumor.

Context: Adrenocortical virilizing tumors are rare in the pediatric age group. Laparoscopic surgery is the gold standard method for treatment of adrenal functional tumors under 6 cm in size, in adults. There has been very little use of laparoscopy in children and there is no report of its application in the treatment of adrenal carcinoma in childhood.

Primary bone lymphoma in 24 patients treated between 1955 and 1999.

The authors present their experience in the treatment of 24 patients with primary bone lymphoma. Eighty-one patients treated between 1955 and 1999 were evaluated, and 57 were excluded because of misdiagnosis. The male to female ratio was 7:5 and the median age was 38.