The purpose of this work is to carry out an exhaustive analysis of the characteristics of osteosarcoma in patients with an age equal to or greater than 40 years, in the Hospital de la Santa Creu and Sant Pau in Barcelona, during the years 1986-2016, with the objective to establish the factors that determine the disease and survival, as well as to evaluate the rates of limb salvage and amputation after neodyuvant chemotherapy. With the result of the results, the report of osteosarcoma and the age less than 40 years, with the aim of providing new information that is related to the appearance of osteosarcoma is available from 40 years.

The main objectives of this study are the following:

• Describe the prognostic factors of osteosarcoma in patients aged 40 years or older, treated at the Hospital de la Santa Creu and Sant Pau in Barcelona during the years 1986-2016, as well as overall survival and disease-free survival.
• Quantify the frequency of limb salvage surgery and amputation, determining the influence of the use of neoadjuvant chemotherapy in the definitive therapeutic management.
• Compare the results obtained with a group formed patients with a range of less than 40 years, diagnosed and treated with osteosarcoma at the Hospital de la Santa Creu i Sant Pau in Barcelona during the same period of years.

The secondary objectives of this study are the following:

• Analyze the frequency of occurrence of local recurrence.
• Determine postoperative complications.
• Evaluate the frequency of distant spread of the disease.
• Describe the characteristics of the group of patients in the study.
• Demonstrate that the incidence of osteosarcoma in adulthood is increasing over the years.
• Determine predisposing factors or lesions to the appearance of osteosarcoma not described in the literature.

First age group (equal or> 40 years old):

• Inclusion criteria:

  • Osteosarcoma localized in axial skeleton or limbs, diagnosis confirmed by performing a biopsy of the lesion in the Hospital of Santa Creu i Sant Pau, and subsequent histological analysis by the Pathological Anatomy Service of the same center, or, by histological review of the sample from the biopsy performed in the reference center of patients from other hospitals.
  • Age equal to or greater than 40 years.
  • Minimum follow-up of 12 months. The patients included in the study have met all the inclusion criteria.

• Exclusion criteria:

  • Osteosarcomas from other locations (head, neck, thorax and cervical, dorsal or lumbosacral spine).
  • Age less than 40 years.
  • Follow-up less than 12 months.
  • Patients who present as a single surgical intervention, and therefore, osteosarcoma was not treated surgically in a definitive manner.
  • Patients in whom there is an inconsistency between the histological diagnosis of the biopsy and the resection piece, that is, the diagnosis after the definitive study of the resection piece has not corresponded to the osteosarcoma, although it is outside the histological study of the bone biopsy.
  • Patients who have undergone a surgical treatment of their tumor lesion, except in the diagnostic biopsy, in another hospital center.

Second age group (<40 years):

• Inclusion criteria:

• Osteosarcoma localized in axial skeleton or limbs, diagnosis confirmed by performing a biopsy of the lesion in the Hospital of Santa Creu i Sant Pau, and subsequent histological analysis by the Pathological Anatomy Service of the same center, or, by histological review of the sample obtained from the biopsy performed in the reference center of patients from other hospitals.
• Age less than 40 years for the first age group.
• Minimum follow-up of 12 months.

The patients included in the study have met all the inclusion criteria.

• Exclusion criteria:

• Osteosarcomas from other locations (head, neck, thorax and cervical, dorsal or lumbosacral spine).
• Age equal to or greater than 40 years.
• Follow-up less than 12 months.
• Patients subjected to a biopsy as the only surgical intervention, and that therefore, osteosarcoma was not definitively treated surgically.
• Patients in whom there is an incongruence between the histological diagnosis of the biopsy and the resection piece, that is, the diagnosis after the definitive study of the resection piece has not corresponded to that of osteosarcoma, although initially it was after the study Histological examination of the bone biopsy.
• Patients who have undergone a surgical treatment of their tumor lesion, except for the diagnostic biopsy, in another hospital center.

Patients diagnosed with osteosarcoma located in the extremities or pelvis.

Number of subjects over 40 years: 37 patients. Number of subjects under 40 years old: 100 patients.