Objective- To assess osteosarcoma epidemiology in Haji Adam Malik General
Hospital. Material and Methods- This study is a retrospective descriptive study with a crosssectional
approach. Patient with musculoskeletal tumour (especially osteosarcoma) in Haji
Adam Malik Hospital from January 2012 to Desember 2017 period, got their age, gender,
musculoskeletal tumour type, biopsy result, tumour sites, treatment completion, metastasis and
amputation status recorded from their medical record. Result-Primary bone tumors is the most
cases and found in 50% of musculoskeletal tumors followed by soft tissue tumors and
metastatic bone disease. Male (60%) have slightly higher prevalence than female in (40%). The
incidence of primary bone tumors shows osteosarcoma, GCT, and osteochondroma are in the
top three with 63%, 13%, and 6% respectively. Specifically for osteosarcoma, male and female
have 1.9 : 1 prevalence ratio. The most common sites for osteosarcoma is distal the femur
(45%) and proximal tibia (29%). About 63% of patients undergo complete treatment and with
55% recorded with metastasis in the first diagnosis and amputation was performed in 89% of
patients. Conclusion- Primary bone tumors dominate the data with 50% for musculoskeletal
tumors followed by 31% soft tissue tumors and 19% metastatic bone disease. The incidence of
musculoskeletal tumors shows that men are slightly higher than women in 60% and 40%. The
incidence of primary bone tumors shows osteosarcoma, giant cell tumor, and osteochondroma
are in the top three with 63%, 13%, and 6% respectively.