TERT promoter mutations are rare in bone and soft tissue sarcomas of Japanese patients

Saito,Tsuyoshi; Akaike,Keisuke; Kurisaki‑Arakawa,Aiko; Toda‑Ishii,Midori; Mukaihara,Kenta; Suehara,Yoshiyuki; Takagi,Tatsuya; Kaneko,Kazuo; Yao,Takashi

doi:10.3892/mco.2015.674

TERT promoter mutations are rare in bone and soft tissue sarcomas of Japanese patients

Authors:
- Tsuyoshi Saito
- Keisuke Akaike
- Aiko Kurisaki‑Arakawa
- Midori Toda‑Ishii
- Kenta Mukaihara
- Yoshiyuki Suehara
- Tatsuya Takagi
- Kazuo Kaneko
- Takashi Yao
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Affiliations: Department of Human Pathology, Juntendo University School of Medicine, Tokyo 113‑8421, Japan, Department of Orthopaedic Surgery, Juntendo University School of Medicine, Tokyo 113‑8421, Japan
Published online on: November 9, 2015 https://doi.org/10.3892/mco.2015.674
Pages: 61-64

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Abstract

Recurrent hot‑spot mutations in the telomerase reverse transcriptase (TERT) promoter have been reported in various types of tumor. In several tumor types, TERT promoter mutations are associated with poor clinical outcomes. TERT promoter mutations are reported to be rare in soft tissue tumors, with the exception of myxoid liposarcoma (MLS). Our previous study reported that TERT promoter mutations occurred in a subset of solitary fibrous tumors (SFTs) and were associated with adverse clinical outcomes in Japanese individuals. The site‑specific frequency (e.g. central nervous or soft tissue origin) of TERT promoter mutations in our SFT cases appeared to be different from previously reported values in a European population. These findings prompted the present study to elucidate the potential role of ethnic background in the different frequencies of TERT promoter mutations in bone and soft tissue sarcomas. In the present study, TERT promoter mutations were examined in 180 cases of bone and soft tissue sarcomas. TERT promoter region mutations were identified in 10 cases [5 SFTs, 3 MLSs, 1 undifferentiated pleomorphic sarcoma (UPS) and 1 malignant granular cell tumor]. All mutations were C228T. The frequencies of TERT promoter mutation in MLS and UPS were 23.1 (3/13) and 5% (1/20), respectively. Only 1/5 patients with TERT‑mutated tumors experienced local recurrence or distant metastasis. The present study revealed the first case of a malignant granular cell tumor with a TERT promoter mutation and revealed that the frequency of TERT promoter mutations in MLSs of Japanese patients is lower compared with that reported in German patients, providing evidence of a possible ethnic difference in the frequency of TERT promoter mutations.

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