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Original Article
Serum methotrexate level is inversely related to the outcome of osteosarcoma patients
Jun Ah Lee, Min Suk Kim, Jin Kyung Lee, Dong Ho Kim, Young Joon Hong, Won Seok Song, Wan Hyeong Cho, Soo-Yong Lee, Jung Sub Lim, Kyung Duk Park, Dae-Geun Jeon
Clin Exp Pediatr. 2009;52(5):581-587.   Published online May 15, 2009
Purpose : To evaluate the correlation between serum methotrexate (MTX) peak levels and clinical outcome of osteosarcoma, as well as to determine the correlation of these levels with the histologic response and event-free survival (EFS). Methods : To maintain the homogeneity of the study population, we selected 52 patients with localized extremity osteosarcoma who had received two cycles of neoadjuvant...