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Effect of Suboptimal Chemotherapy on Preoperative Chemoradiation in Rectal Cancer

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ÀÌÁöÇý ( Lee Ji-Hye ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ¹æ»ç¼±Á¾¾çÇб³½Ç
°­Çöö ( Kang Hyun-Cheol ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ¹æ»ç¼±Á¾¾çÇб³½Ç
ÁöÀDZԠ( Chie Eui-Kyu ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ¹æ»ç¼±Á¾¾çÇб³½Ç
°­°æÈÆ ( Kang Gyeong-Hoon ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ º´¸®Çб³½Ç
¹ÚÀç°© ( Park Jae-Gahb ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ¿Ü°úÇб³½Ç
¿Àµµ¿¬ ( Oh Do-Youn ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ³»°úÇб³½Ç
ÀÓ¼®¾Æ ( Im Seock-Ah ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ³»°úÇб³½Ç
±èÅÂÀ¯ ( Kim Tae-You ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ³»°úÇб³½Ç
¹æ¿µÁÖ ( Bang Young-Jue ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ³»°úÇб³½Ç
ÇϼºÈ¯ ( Ha Sung-Whan ) - ¼­¿ï´ëÇб³ Àǰú´ëÇÐ ¹æ»ç¼±Á¾¾çÇб³½Ç

Abstract

¸ñÀû: Á÷Àå¾Ï¿¡¼­ ¼ö¼ú Àü Ç×¾ÏÈ­Çйæ»ç¼±Ä¡·á´Â ¼ö¼ú ÈÄ Ç×¾ÏÈ­Çйæ»ç¼±Ä¡·á¿¡ ºñÇÏ¿© Ä¡·á ¼ºÀûÀº ºñ½ÁÇÏ¸ç µ¶¼ºÀº ³·¾Æ ÃÖ±Ù¿¡ ¸¹ÀÌ ½ÃÇàµÇ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ¼ö¼ú Àü Ç×¾ÏÈ­Çйæ»ç¼±Ä¡·á ½Ã º´ÇàÇÑ Ç×¾ÏÈ­Çпä¹ý Áß ÀûÁ¤ ¿ä¹ý°ú ÀûÁ¤ ÀÌÇÏÀÇ ºñÀûÁ¤ ¿ä¹ý¿¡ µû¸¥ Ä¡·á °á°ú¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.

´ë»ó ¹× ¹æ¹ý: 2003³â 4¿ùºÎÅÍ 2006³â 4¿ù±îÁö ¼ö¼ú Àü Ç×¾ÏÈ­Çйæ»ç¼±Ä¡·á¿Í ¼ö¼úÀ» ½ÃÇàÇÑ È¯ÀÚ Áß ¼ö¼ú º´¸® °á°ú È®º¸°¡ °¡´ÉÇÏ°í ´ÜÀÏ Á¦Á¦ È­Çпä¹ýÀ» ½ÃÇàÇÑ È¯ÀÚ 43¸íÀ» ´ë»óÀ¸·Î ÇÏ¿´´Ù. ¹æ»ç¼±Ä¡·á´Â Àü °ñ¹Ý¿¡ 41.4¡­50.4 Gy (Áß¾Ó°ª, 45 Gy), Á¾¾ç¿¡ Ãß°¡Á¶»ç 0¡­5.4 Gy (Áß¾Ó°ª, 5.4 Gy), ÃÑ 41.4¡­50.4 Gy (Áß¾Ó°ª, 50.4 Gy)¸¦ ½ÃÇàÇÏ¿´´Ù. ÀûÁ¤±ºÀº 5-fluorouracil (5-FU) 500 mg/m2/day¸¦ ¹æ»ç¼±Ä¡·á ù 3ÀÏ µ¿¾È°ú 5ÁÖ ÈÄ 3ÀÏ µ¿¾È¿¡ ¹Ýº¹ ±Þ¼Ó Á¤ÁÖ ÇÑ 6¸í°ú °æ±¸ capecitabineÀ» ¹æ»ç¼± Ä¡·áÀÏ¿¡ »ç¿ëÇÑ 6¸íÀ¸·Î ÃÑ 12¸íÀ̾ú´Ù. ºñÀûÁ¤±ºÀº µ¿ÀÏ·®ÀÇ 5-FU¸¦ ¹æ»ç¼±Ä¡·á ù 3ÀÏ¿¡¸¸ ±Þ¼Ó Á¤ÁÖÇÑ 31¸íÀ̾ú´Ù. ¼ö¼úÀº ¹æ»ç¼±Ä¡·á°¡ ³¡³­ µÚ 40¡­71ÀÏ(Áß¾Ó°ª, 58ÀÏ)¿¡ ½ÃÇàÇÏ¿´°í 36¸íÀº ÇÏÀü¹æÀýÁ¦¼úÀ», 7¸íÀº º¹È¸À½ÀýÁ¦¼úÀ» ½ÃÇàÇÏ¿´´Ù.

°á°ú: ÀûÁ¤±º°ú ºñÀûÁ¤±º »çÀÌ¿¡, Ä¡·á¹ÝÀÀ µî±Þ 3 ÀÌ»óÀÇ Ä¡·á¹ÝÀÀ(83.3% vs. 67.7%, p=0.456), ¼ö¼ú Àü°ú ºñ±³
ÇÑ ¼ö¼ú ÈÄÀÇ º´±âÇϰ­(75.0% vs. 67.7%, p=0.727), ÁÖº¯ÀýÁ¦¿¬ 2 mm ÃʰúÀÇ È¹µæ(66.7% vs. 83.9%, p=0.237)
µî¿¡¼­ Åë°èÀûÀ¸·Î À¯ÀÇÇÏ°Ô Â÷À̸¦ º¸ÀÌÁö´Â ¾Ê¾ÒÀ¸³ª, º´º¯ÀÇ À§Ä¡°¡ Ç×¹®¿¡¼­ 5 cm À̳»¿¡ À§Ä¡ÇÑ °æ¿ì ºñÀûÁ¤
±º¿¡¼­ °ý¾à±Ù º¸Á¸ ¼ö¼úÀ» ½ÃÇàÇÑ ºñÀ²ÀÌ ÀûÁ¤±º¿¡ ºñÇÏ¿© ´õ ³·Àº °æÇâÀ» º¸¿´´Ù(75% vs. 100%, p=0.068). ¸ðµç
ȯÀÚ¿¡¼­ 3µµ ÀÌ»óÀÇ µ¶¼ºÀº °üÂûµÇÁö ¾Ê¾Ò´Ù.

°á·Ð: ºñÀûÁ¤±º¿¡¼­ Ä¡·á¿¡ ¼ö¹ÝµÇ´Â µ¶¼ºÀº ³·¾ÒÀ¸³ª ¸ðµÎ 2µµ ÀÌÇÏ¿´°í, Ç×¹®¿¡¼­ 5 cm À̳»¿¡ À§Ä¡ÇÑ Á÷Àå¾Ï
ÀÇ ¼ö¼ú ½Ã °ý¾à±Ù º¸Á¸ ¼ö¼ú·üÀÌ ´õ ³·Àº °æÇâÀ» º¸¿© ÀûÁ¤ È­Çпä¹ýÀÇ º´ÇàÀ» ½ÃÇàÇÏ´Â °ÍÀÌ ¹Ù¶÷Á÷ÇϰڴÙ.

Purpose: To examine the effect of suboptimal chemotherapy in patients undergoing preoperative chemoradiotherapy for the treatment of rectal cancer.

Materials and Methods : The medical records of 43 patients who received preoperative concurrent chemoradiotherapy, followed by radical surgery for the treatment of pathologically proven adenocarcinoma of the rectum from April 2003 to April 2006 were retrospectively reviewed. The delivered radiation dose ranged from 41.4 to 50.4 Gy. The standard group consisted of patients receiving two cycles of a 5-FU bolus injection for three days on the first and fifth week of radiotherapy or twice daily with capecitabine. The standard group included six patients for each regimen. The non-standard group consisted of patients receiving one cycle of 5-FU bolus injection for three days on the first week of radiotherapy. The non-standard group included 31 patients. Radical surgery was performed at a median of 58 days after the end of radiotherapy. A low anterior resection was performed in 36 patients, whereas an abdominoperineal resection was performed in 7 patients.

Results: No significant difference was observed between the groups with respect to pathologic responses ranging from grades 3 to 5 (83.3% vs. 67.7%, p=0.456), downstaging (75.0% vs. 67.7%, p=0.727), and a radial resection margin greater than 2 mm (66.7% vs. 83.9%, p=0.237). The sphincter-saving surgery rate in low-lying rectal cancers was lower in the non-standard group (100% vs. 75%, p=0.068). There was no grade 3 or higher toxicity observed in all patients.

Conclusion: Considering that the sphincter-saving surgery rate in low-lying rectal cancer was marginally lower for patients treated with non-standard, suboptimal chemotherapy, and that toxicity higher than grade 2 was not observed in the both groups, suboptimal chemotherapy should be avoided in this setting.

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Á÷Àå¾Ï;¼ö¼ú Àü Ç×¾ÏÈ­Çйæ»ç¼±Ä¡·á;°ý¾à±Ù º¸Á¸
Rectal cancer;Preoperative;Chemoradiotherapy

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