503O_PR - CIC-rearranged sarcoma and BCOR-CCNB3 sarcoma: Clinical characteristics and treatment results of the newly-established “Ewing sarcoma-like” small r...

Date 17 December 2016
Event ESMO Asia 2016 Congress
Session Sarcoma
Topics Biomarkers
Sarcoma
Presenter Makoto Endo
Citation Annals of Oncology (2016) 27 (suppl_9): ix163-ix168. 10.1093/annonc/mdw597
Authors M. Endo1, M. Sugawara1, A. Yoshida2, E. Kobayashi1, T. Shimoi3, M. Kodaira3, M. Yunokawa3, K. Yonemori3, K. Tamura3, S. Toki1, T. Hirose1, T. Uehara1, T. Mori1, K. Shimizu1, Y. Tanzawa1, F. Nakatani1, H. Chuman1, A. Kawai1
  • 1Musculoskeletal Oncology And Rehabilitation / Rare Cancer Center, National Cancer Center Hospital, 104-0045 - Tokyo/JP
  • 2Pathology And Clinical Laboratories / Rare Cancer Center, National Cancer Center Hospital, 104-0045 - Tokyo/JP
  • 3Breast And Medical Oncology / Rare Cancer Center, National Cancer Center Hospital, 104-0045 - Tokyo/JP

Abstract

Background

Recent molecular genetic analyses have disclosed that a subset of “Ewing sarcoma-like” small round cell sarcomas harbor CIC-DUX4, CIC-FOXO4 or BCOR-CCNB3 fusion gene in their tumor cells. The objective of this study is to clarify the clinical characteristics and treatment outcome of CIC-rearranged sarcoma (CIC sarcoma) and BCOR-CCNB3 sarcoma (BCOR sarcoma) because little is known about these newly-established sarcomas.

Methods

We retrieved 17 patients with CIC sarcoma and 7 patients with BCOR sarcoma diagnosed at our hospital. The clinical information was collected from the medical charts.

Results

The patients with CIC sarcoma were 12 males and 5 females, whereas all of the 7 patients with BCOR sarcoma were males. Ages at the initial visit ranged from 15 to 73 years (median 22 years) for CIC sarcoma; 4 to 16 years (median 12 years) for BCOR sarcoma. All of the 17 CIC sarcomas occurred in the soft tissue; 5 of the 7 BCOR sarcomas occurred in the bone. On images, all 17 CIC sarcomas presented lobular pattern, which was not evident in BCOR sarcomas. At the initial visit, 12 patients with CIC sarcoma had distant metastases to lung (n = 10), lymph node (n = 4), bone (n = 3), pleura (n = 3), and brain (n = 3), which were overlapped in some patients. In contrast, no patients with BCOR sarcoma had metastases at the time of diagnosis. Surgery was performed at 4 of the 5 patients with localized CIC sarcoma, resulting in no local recurrence. Chemotherapy was performed at all of the 12 patients with metastasized CIC sarcoma, using VDC/I(E) (n = 5), VAC (n = 3), AI (n = 2), or doxorubicin alone (n = 2) as the first-line regimen. Best overall response was CR (n = 1), PR (n = 2), SD (n = 3), and PD (n = 6). Median overall survival of patients with CIC sarcoma was 10 months, and the clinical outcome was CDF (n = 3), NED (n = 1), AWD (n = 1), and DOD (n = 12). The outcome of BCOR sarcoma was CDF (n = 6) and AWD (n = 1); no patients had died with a median follow-up of 64 months.

Conclusions

CIC and BCOR sarcomas show the distinctive clinical features and the different prognosis: BCOR sarcoma shows substantially better prognosis. The precise diagnosis of CIC or BCOR sarcoma leads to the suitable management based on the precise prognostic prediction.

Clinical trial indentification

Legal entity responsible for the study

N/A

Funding

Japanese Society for Promotion of Science

Disclosure

All authors have declared no conflicts of interest.