Serum tumor markers in pediatric osteosarcoma: a summary review.

Osteosarcoma is the most common primary high-grade bone tumor in both adolescents and children. Early tumor detection is key to ensuring effective treatment. Serum marker discovery and validation for pediatric osteosarcoma has accelerated in recent years, coincident with an evolving understanding of molecules and their complex interactions, and the compelling need for improved pediatric osteosarcoma outcome measures in clinical trials.

[Bone tumor frequency in adults and elderly].

Introduction: We consider of great importance knowing the types of bone tumors and tumor-like lesions in adults and the elderly, which are increasing in proportion in our country.

Objectives: (1) To analyze the frequency of bone tumors and tumor-like lesions in adults and elderly; (2) to determine any difference between these two groups; (3) and to analyze the most frequent sites of involvement.

Material And Methods: We conducted a cross-sectional descriptive study that consisted in a retrolective review of all cases classified as a bone tumor or a tumorlike condition from year 2000-2006.

[Prevalence of bone neoplasms in adolescents and young adults].

Introduction: The objectives of this work were: (1) To determine the prevalence of bone neoplasms and pseudoneoplasms lesions in a group of adolescents (15 to 19 years), (2) To determine the more frequent bone neoplasms and pseudoneoplasms lesions in a group of young adults (29 to 39 years), (3) To determine if there are differences in the frequency of bone neoplasms and pseudoneoplasms lesions between the group of adolescents and the group of young adults and (4) To determine if there is any difference according to gender.

Material And Methods: We conducted a descriptive, cross-sectional study that consisted in the review of the Pathology Department files in the National Institute of Rehabilitation. We included all patients with a histopathologic diagnosis of bone neoplasms or pseudoneoplasms lesion from January 2000 to December 2006 within the age of presentation from 15 to 19 or 20 to 39 years.

[Frequency of bone neoplasms in children].

Introduction: Pediatric age is the group mainly affected by bone tumors. The objectives of this work were: (1) To determine which are the bone tumors and pseudotumoral lesions more frequent in the group of age from 0 to 14 years; (2) To determine if there are differences in the frequency of the tumors and pseudotumoral lesions between different subgroups and (3) To determine if there is any difference in the frequency of the different tumors according to gender.

Methods: We conducted a cross-sectional study based on the Pathology files of the National Institute of Rehabilitation.

[Epidemiology of bone and soft-part tumors of the foot and knee].

Design: Report of cases.

Objective: Review of the cases in a period of 10 years with bone and soft tumors in foot and ankle, to knowing epidemilogical, clinic and patologic anatomy parameters to describe the behavior.

Materials And Methods: Review of 166 cases from 1991 to 2000 and been analyze with descriptive statistic, association measurment for inside stratum, with odds ratio, hipótesis test with chi square for qualitative date and t to Student for quantitative date.