Cancer Research and Treatment

Original Article

Genitourinary cancer

Oncological Outcomes in Men with Metastatic Castration-Resistant Prostate Cancer Treated with Enzalutamide with versus without Confirmatory Bone Scan: Chang Wook Jeong, Jang Hee Han, Dong Deuk Kwon, Jae Young Joung, Choung-Soo Kim, Hanjong Ahn, Jun Hyuk Hong, Tae-Hwan Kim, Byung Ha Chung, Seong Soo Jeon, Minyong Kang, Sung Kyu Hong, Tae Young Jung, Sung Woo Park, Seok Joong Yun, Ji Yeol Lee, Seung Hwan Lee, Seok Ho Kang, Cheol Kwak; Cancer Res Treat. 2024;56(2):634-641. Published online December 5, 2023; DOI: https://doi.org/10.4143/crt.2023.848

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Purpose
In men with metastatic castration-resistant prostate cancer (mCRPC), new bone lesions are sometimes not properly categorized through a confirmatory bone scan, and clinical significance of the test itself remains unclear. This study aimed to demonstrate the performance rate of confirmatory bone scans in a real-world setting and their prognostic impact in enzalutamide-treated mCRPC.
Materials and Methods
Patients who received oral enzalutamide for mCRPC during 2014-2017 at 14 tertiary centers in Korea were included. Patients lacking imaging assessment data or insufficient drug exposure were excluded. The primary outcome was overall survival (OS). Secondary outcomes included performance rate of confirmatory bone scans in a real-world setting. Kaplan-Meier analysis and multivariate Cox regression analysis were performed.
Results
Overall, 520 patients with mCRPC were enrolled (240 [26.2%] chemotherapy-naïve and 280 [53.2%] after chemotherapy). Among 352 responders, 92 patients (26.1%) showed new bone lesions in their early bone scan. Confirmatory bone scan was performed in 41 patients (44.6%), and it was associated with prolonged OS in the entire population (median, 30.9 vs. 19.7 months; p < 0.001), as well as in the chemotherapy-naïve (median, 47.2 vs. 20.5 months; p=0.011) and post-chemotherapy sub-groups (median, 25.5 vs. 18.0 months; p=0.006). Multivariate Cox regression showed that confirmatory bone scan performance was an independent prognostic factor for OS (hazard ratio 0.35, 95% confidence interval, 0.18 to 0.69; p=0.002).
Conclusion
Confirmatory bone scan performance was associated with prolonged OS. Thus, the premature discontinuation of enzalutamide without confirmatory bone scans should be discouraged.

Citations

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ECM-mimicking hydrogel models of human adipose tissue identify deregulated lipid metabolism in the prostate cancer-adipocyte crosstalk under antiandrogen therapy
Agathe Bessot, Joan Röhl, Maria Emmerich, Anton Klotz, Akhilandeshwari Ravichandran, Christoph Meinert, David Waugh, Jacqui McGovern, Jenni Gunter, Nathalie Bock
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Case Report

A Case of Spine Origin Chondroblastoma Metastasis to Lung: Se Hoon Sohn, Sung Aee Koh, Dong Geun Kim, Sung Woo Park, Kyung Hee Lee, Min Kyoung Kim, Jun Hyuk Choi, Myung Soo Hyun; Cancer Res Treat. 2009;41(4):241-244. Published online December 31, 2009; DOI: https://doi.org/10.4143/crt.2009.41.4.241

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Chondroblastoma is a rare benign cartilaginous neoplasm that accounts for approximately 1% of all bone tumors and characteristically arises in the epiphysis of a long bone, particularly the humerus, tibia, and femur. Chondroblastoma can affect people of all ages. It is, however, most common in children and young adults between the ages of 10 and 20 years. Although most chondroblastomas are cured by limited surgical procedures, occasional lesions behave more aggressively and may even metastasis. In this case a young man with pulmonary metastatic chondroblastoma on spine is presented. Unlike previously published examples of metastatic chondroblastoma, these metastasis developed before any operative manipulation of the primary tumor. And primary tumor site was also unusual. The histologic characteristics of the primary, metastatic tumors were those of a conventional chondroblastoma.

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