e12039 Background: Brazil provides 1% of the worldwide scientific output registered in ASCO. However, contribution made by other LATAM countries remains unknown. The main objective is to evaluate LATAM countries’ scientific output regarding hematology and oncology and their global impact. Methods: Astructured search was made in ASCO, ASH, ESMO and ASTRO databases to identify abstracts recorded between 2000 and 2010 referring to any author, institution or population from LATAM. The search was expanded using Internet to find indexed or non-indexed publications referring to each selected reference. Simple random sampling was used to check 10% of the references and verify the quality of the data. Results: 1,858 of the 2,625 references that were identified fulfilled the inclusion criteria. Sixteen of 19 countries evaluated had at least one record during the 10 year target period; five countries represented 93.6% of scientific output (Brazil 51.1%/Argentina 19.9%/ Mexico 14.1%/Peru 6.2%/Chile 2.4%) whilst Colom...