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Original Article
Hematology and Oncology
Lymphocyte-monocyte ratio at day 14 of first cisplatin-doxorubicin chemotherapy is associated with treatment outcome of pediatric patients with localized osteosarcoma
Jun Ah Lee, Hea Lin Oh, Dong Ho Kim, Jung Sub Lim
Clin Exp Pediatr. 2019;62(2):62-67.   Published online October 1, 2018

Purpose: We aimed to determine the prognostic significance of lymphocyte counts and the lymphocytemonocyte ratio (LMR) in pediatric patients with osteosarcoma. Methods: We retrospectively reviewed the medical records of 27 pediatric patients with localized extremity osteosarcoma, treated at the Korea Cancer Center Hospital between May 2002 and March 2016. Leukocyte counts and LMR before treatment and on day 14 (LMR14) of...
Oncology
Metformin displays in vitro and in vivo antitumor effect against osteosarcoma
Yunmi Ko, Aery Choi, Minyoung Lee, Jun Ah Lee
Clin Exp Pediatr. 2016;59(9):374-380.   Published online September 21, 2016
Purpose

Patients with unresectable, relapsed, or refractory osteosarcoma need a novel therapeutic agent. Metformin is a biguanide derivative used in the treatment of type II diabetes, and is recently gaining attention in cancer research.

Methods

We evaluated the effect of metformin against human osteosarcoma. Four osteosarcoma cell lines (KHOS/NP, HOS, MG-63, U-2 OS) were treated with metformin and cell proliferation was evaluated using...

Review Article
Osteosarcoma in Korean children and adolescents
Jun Ah Lee
Clin Exp Pediatr. 2015;58(4):123-128.   Published online April 22, 2015

Osteosarcoma is the most frequent primary bone tumor. Advances in combination chemotherapy and surgical technique have greatly improved the survival of patients with osteosarcoma. In Korea, improvements in osteosarcoma treatment have been made over the past two decades. The 5-year event-free survival rate of Korean children and adolescents with localized disease is 64.6%, comparable to that of American or European...

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...
Iron chelating agent, deferoxamine, induced apoptosis in Saos-2 osteosarcoma cancer cells
Eun Hye Park, Hyo Jung Lee, Soo Yeon Lee, Sun Young Kim, Ho Keun Yi, Dae Yeol Lee, Pyoung Han Hwang
Clin Exp Pediatr. 2009;52(2):213-219.   Published online February 15, 2009
Purpose : Iron is a critical nutritional element that is essential for a variety of important biological processes, including cell growth and differentiation, electron transfer reactions, and oxygen transport, activation, and detoxification. Iron is also required for neoplastic cell growth due to its catalytic effects on the formation of hydroxyl radicals, suppression of host defense cell activities, and promotion of...
Outcome after relapse in childhood and adolescent osteosarcoma : single institution experience in Korea
Yun-Jeong Lee, Hyun-Jae Lee, Dong-Ho Kim, Jung-Sub Lim, Jun-Ha Lee, Kyung-Duk Park, Dae-Geun Jeon, Soo-Yong Lee
Clin Exp Pediatr. 2008;51(1):78-83.   Published online January 15, 2008
Purpose : Osteosarcoma is the most common primary malignant bone tumor in children and adolescents. Although survival rate of osteosarcoma patients has markedly improved, about 20-30% of patients still have a relapse. This study was aimed to find factors that influence postrelapse survival of osteosarcoma in childhood and adolescents. Methods : Between 1985 and 2004, of 461 patients who were diagnosed...
Case Report
A case of Rothmund-Thomson syndrome
Seung Hyo Kim, Choong Ho Shin, Sei Won Yang
Clin Exp Pediatr. 2006;49(5):565-569.   Published online May 15, 2006
Rothmund-Thomson syndrome (RTS), is a rare autosomal recessive disorder, characterized by : skin photosensitivity, poikiloderma, sparse hair, sparse eyebrows/lashes, short stature, skeletal abnormalities, cataracts, and an increased risk of malignancy. Skeletal abnormalities include : dysplasia, absent or malformed bones, such as absent radii, osteopenia, and delayed bone formation. RTS is thought to result from chromosomal instability, and children with RTS...