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Abstract

¸ñ Àû: º» ¿¬±¸´Â Èä¼±»óÇÇÁ¾ÀÇ ¼ö¼ú ¹× ¼ö¼ú ÈÄ ¹æ»ç¼±Ä¡·áÀÇ Ä¡·á ¼ºÀû°ú ¿¹ÈÄ ÀÎÀڷμ­ WHO ¼¼Æ÷ÇüÀÇ Á߿伺¿¡ ´ëÇÏ¿© ¾Ë¾Æº¸°í, ¹æ»ç¼± Á¶»ç ¹üÀ§¸¦ Á¾¾çÀÌ ÀÖ´ø ºÎÀ§·Î ±¹ÇÑÇÏ¿´À» ¶§ Àç¹ß ¾ç»óÀ» ºÐ¼®ÇÏ¿© Á¶»ç ¹üÀ§ÀÇ ÀûÀý¼ºÀ» Æò°¡ÇÏ¿´´Ù.

´ë»ó ¹× ¹æ¹ý: 1994³â 12¿ùºÎÅÍ 2004³â 6¿ù±îÁö Èä¼±»óÇÇÁ¾À¸·Î Áø´Ü ¹Þ°í ¼ö¼úÀ» ½ÃÇà ¹ÞÀº 160¸íÀ» ´ë»óÀ¸·Î ÇÏ¿´´Ù. ¼ö¼ú ¹× º´¸®Á¶Á÷ ¼Ò°ß »ó (1) Á¾¾çÀÇ ¿ÏÀü ÀýÁ¦°¡ ÀǽɵǴ °æ¿ì, (2) º´¸® °Ë»ç°á°ú ÀýÁ¦¿¬ÀÌ ¾ç¼ºÀÎ °æ¿ì,(3) Á¶Á÷º´¸®°¡ WHO ¼¼Æ÷Çü B2ÀÌ»óÀÎ °æ¿ì, (4) Masaoka º´±â 2±â ÀÌ»óÀÎ °æ¿ì¿¡ ¼ö¼ú ÈÄ ¹æ»ç¼±Ä¡·á¸¦ Ãß°¡Çϵµ·Ï ±ÇÀ¯ÇÏ¿´À¸¸ç, ½ÇÁ¦ 99¸íÀÌ ¼ö¼ú ÈÄ ¹æ»ç¼±Ä¡·á¸¦ ½ÃÇà¹Þ¾Ò´Ù. ¹æ»ç¼±Ä¡·áÀÇ Ç¥Àû ¿ëÀûÀº Á¾¾ç ¿ø¹ß ºÎÀ§¿¡¼­ 1.5¡­2 cm ¿©À¯¸¦ µÎ°í °áÁ¤ÇÏ¿´À¸¸ç, ¸ÅÀÏ 1.8 Gy ¶Ç´Â 2 Gy ¾¿, ÁÖ 5ȸ Á¶»çÇÏ´Â Åë»óºÐÇÒÁ¶»ç¹ýÀ¸·Î ¸ñÇ¥¼±·®Àº 54 Gy¿´´Ù.

°á °ú: Àüü ȯÀÚÀÇ 5³â »ýÁ¸À²Àº 87.3%¿´´Ù. ´Üº¯·® ºÐ¼®°á°ú 5³â »ýÁ¸À²¿¡ À¯ÀÇÇÑ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚ´Â ¿¬·É(60¼¼ ÀÌ»ó 77.8%, 60¼¼ ¹Ì¸¸ 91.3%: p=0.03), Masaoka º´±â(1±â 92.2%, 2±â 95.4%, 3±â 82.1%, 4±â 67.5%: p=0.001),WHO ¼¼Æ÷Çü(A-B1 96.0%, B2-C 82.4%: p=0.001), ÀýÁ¦ Á¤µµ(¿ÏÀüÀýÁ¦ 92.3%, ºÎºÐÀýÁ¦ ¹× Á¶Á÷°Ë»ç 72.3%: p=0.001)¿´´Ù. ´Ùº¯·® ºÐ¼® °á°ú´Â WHO ¼¼Æ÷Çü¸¸ÀÌ À¯ÀÇÇÑ Â÷ÀÌ(p=0.03)¸¦ º¸¿´´Ù. À°¾ÈÀû ¿ÏÀü ÀýÁ¦(R0-1 ÀýÁ¦) ÈÄ º¸Á¶Àû ¹æ»ç¼± Ä¡·á¸¦ Á¾¾ç ¿ø¹ß ºÎÀ§¿¡¸¸ ½ÃÇà ¹Þ¾Ò´ø Masaoka º´±â 1-3±â ȯÀÚ 71¸í Áß ÃÑ 5¸í¿¡¼­ Àç¹ßÀÌÈ®ÀεǾú°í, Àç¹ß ºÎÀ§´Â ´Á¸·°­ ÆÄÁ¾ÀÌ 2¸í, ½ÉÀ帷°­ ÆÄÁ¾ ¹× Æó ÀüÀÌ 1¸í, Æó ÀüÀÌ 1¸íÀ̾ú°í, ´Ü 1¸í¸¸ÀÌ Á¾°Ýµ¿ ¸²ÇÁÀý Àç¹ßÀ̾ú´Ù. ¸ðµç ȯÀÚ¿¡¼­ ¹æ»ç¼± Á¶»ç¹üÀ§ ¾È¿¡¼­ Àç¹ßÀº ¾ø¾ú´Ù.

°á ·Ð: WHO ¼¼Æ÷ÇüÀº Masaoka º´±â, ¿ÏÀü ÀýÁ¦ ¿©ºÎ, ¿¬·É°ú ÇÔ²² Èä¼±»óÇÇÁ¾ ȯÀÚÀÇ »ýÁ¸À²¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â Áß¿äÇÑ ¿¹ÈÄÀÎÀÚ·Î È®ÀεǾú´Ù. ¶ÇÇÑ ¼ö¼ú ÈÄ º¸Á¶Àû ¹æ»ç¼±Ä¡·á´Â Á¶»ç¹üÀ§¸¦ Á¾¾ç ¿ø¹ß ºÎÀ§¿¡ ±¹ÇÑÇÏ¿© ½ÃÇàÇÏ´Â °ÍÀÌ Àç¹ß ¾ç»ó ¹× ºÎÀÛ¿ëÀ» °í·ÁÇÒ ¶§ ¾ÈÀüÇÏ°í À¯È¿ÇÑ ¹æ¹ýÀ¸·Î ÆǴܵǸç, ´Á¸·°­ ¹× ½ÉÀ帷°­ ÆÄÁ¾¿¡ ÀÇÇÑ Àç¹ßÀ» ¸·±â À§Çؼ­´Â È¿°úÀûÀÎ º¸Á¶Àû Ç×¾ÏÈ­Çпä¹ý¿¡ ´ëÇÑ ¿¬±¸°¡ ÁøÇàµÇ¾î¾ß ÇÒ °ÍÀÌ´Ù.

Purpose: This study was conducted to analyze treatment outcome and prognostic significance of World Health Organization (WHO)-defined thymic epithelial tumor (TET) subtype and to assess optimal radiation target volume in patients receiving surgery and adjuvant radiation therapy with TET.

Materials and Methods: The record of 160 patients with TET, who received surgical resection at the Samsung medical Center, from December 1994 to June 2004, were reviewed. 99 patients were treated with postoperative radiation therapy (PORT). PORT was recommended when patients had more than one findings among suspicious incomplete resection or positive resection margin or Masaoka stage II¡­IV or WHO tumor type B2¡­C. PORT performed to primary tumor bed only with a mean dose of 54 Gy. The prognostic factor and pattern of failure were analyzed retrospectively.

Results: The overall survival rate at 5 years was 87.3%. Age (more than 60 years 77.8%, less than 60 years 91.1%; p=0.03), Masaoka stage (I 92.2%, II 95.4%, III 82.1%, IV 67.5%; p=0.001), WHO tumor type (A-B1 96.0%, B2-C 82.3%; p=0.001), Extent of resection (R0 resection 92.3%, R1 or 2 resection 72.6%; p=0.001) were the prognostic factors according to univariate analysis. But WHO tumor type was the only significant prognostic factor according to multivariate analysis. Recurrence was observed in 5 patients of 71 Masoka stage I-III patients who received grossly complete tumor removal (R0, R1 resection) and PORT to primary tumor bed. Mediastinal recurrence was observed in only one patients. There were no recurrence within irradiation field.

Conclusion: WHO tumor type was the important prognostic factor to predict survival of patients with TET. This study suggest that PORT to only primary tumor bed was optimal. To avoid pleura- or pericardium-based recurrence, further study of effective chemotherapy should be investigated.

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Èä¼±»óÇÇÁ¾;¼ö¼ú ÈÄ ¹æ»ç¼±Ä¡·á;Thymic epithelial tumor;Postoperative radiation therapy

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