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Àü¸³¼±¾Ï ȯ¾Æ¿¡¼­ ¹æ»ç¼± Ä¡·á ÈÄ Àü¸³¼±Æ¯ÀÌÇ׿ø ³óµµ º¯È­ ¾ç»ó Pattern of Decrease of Prostate Specific Antigen after Radical Radiotherapy for the Prostate Cancer

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Abstract

¸ñ Àû : Àü¸³¼±Æ¯ÀÌÇ׿ø(prostate specific antigen, PSA)Àº Àü¸³¼±¾ÏÀÇ Áø´Ü, ¼ö¼úÀ̳ª ¹æ
»ç¼±Ä¡·á ÈÄ °á°ú ÆÇÁ¤ ¹× ÃßÀû°üÂû µî¿¡ ³Î¸® »ç¿ëµÈ´Ù. ±ÙÄ¡Àû¹æ»ç¼±Ä¡·á¸¦ ½ÃÇàÇÑ Àü¸³
¼±¾Ï ȯÀÚ¿¡ ÀÖ¾î Ç÷Áß PSA ³óµµ°¡ °¨¼ÒµÇ´Â ¾ç»ó ¹× ÀÌ¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ÀÎÀÚ µî¿¡ ´ëÇÑ
°íÂûÀ» ÅëÇÏ¿©, ȯÀÚÀÇ ¹æ»ç¼±Ä¡·á ÈÄ °á°ú ÆÇÁ¤ ¹× ÃßÀû°üÂû ½Ã PSA¸¦ ÀÌ¿ëÇÑ °æ°ú ÆÇÁ¤
¿¡ ÇÊ¿äÇÑ ÀڷḦ ¸¶·ÃÇÏ°íÀÚ ÈÄÇâÀû ºÐ¼®À» ½ÃÇàÇÏ¿´´Ù.
¸ñÀû ¹× ¹æ¹ý : 1993³â 4¿ùºÎÅÍ 1998³â 5¿ù±îÁö ¼­¿ï´ëÇб³º´¿ø Ä¡·á ¹æ»ç¼±°ú¿¡¼­ ±ÙÄ¡
Àû¹æ»ç¼±Ä¡·á¸¦ ¹ÞÀº Àü¸³¼±¾Ï ȯÀÚ·Î, È£¸£¸óÄ¡·á³ª Ç×¾ÏÈ­Çпä¹ýÀ» ½ÃÇà ¹ÞÁö ¾ÊÀº 20¸í
À» ´ë»óÀ¸·Î ÇÏ¿´´Ù. ¹æ»ç¼± Ä¡·á´Â Àü°ñ¹Ý¿¡ 45 ³»Áö 50§í Á¶»ç ÈÄ Ãà¼ÒÁ¶»ç¾ß·Î 14 ³»Áö
20§í¸¦ Ãß°¡ÇÏ¿©, Àü¸³¼±¿¡ ÃÑ 63 ³»Áö 70§í¸¦ Á¶»çÇÏ¿´´Ù. ÃßÀû °üÂû ±â°£Àº 13°³¿ù ³»Áö
66°³¿ù·Î Áß¾Ó°ªÀº 26°³¿ùÀ̾ú´Ù. ¹æ»ç¼± Ä¡·á ÈÄ Ç÷Áß PSA ³óµµÀÇ Á¤»óÈ­ ±âÁØÀº 3.0ng/
§¢ ¹Ì¸¸À¸·Î ÇÏ¿´´Ù.
°á °ú : Ç÷Áß PSAÀÇ ³óµµ´Â ¹æ»ç¼± Ä¡·á ÈÄ ¼­¼­È÷ °¨¼ÒÇÏ´Â °æÇâÀ» º¸¿´À¸¸ç, ¹Ý°¨±â´Â
0.6 ³»Áö 4.0°³¿ù·Î Æò±Õ 2.1(¡¾0.9)°³¿ù, Áß¾ÓÄ¡´Â 1.9°³¿ùÀ̾ú´Ù. 20¸íÀÇ È¯ÀÚ Áß 19¸í(95%)
¿¡¼­ PSA ³óµµ°¡ Á¤»ó ¹üÀ§¿¡ µµ´ÞÇÏ¿´°í Á¤»ó ¹üÀ§¿¡ µµ´ÞÇϴµ¥ ¼Ò¿äµÈ ±â°£Àº ¹æ»ç¼±
Ä¡·á Á¾·á Á÷ÈÄ ³»Áö 12°³¿ù·Î Æò±Õ 5.3(¡¾2.7)°³¿ù, Áß¾ÓÄ¡´Â 5.0°³¿ùÀ̾ú´Ù. ¹æ»ç¼± Ä¡·áÀü
ÀÇ PSA ³óµµ°¡ 10ng/§¢ ¹Ì¸¸À̾ú´ø 8¸í Áß 2¸í¿¡¼­ ¹æ»ç¼±Ä¡·á Á¾·á ½Ã PSA ³óµµ°¡ Á¤»ó
È­µÇ¾ú°í, 10ng/§¢ ÀÌ»óÀ̾ú´ø 12¸í¿¡¼­´Â Ä¡·á Á¾·á ½Ã±îÁö Á¤»óÈ­µÇÁö ¾Ê¾Ò´Ù. PSA ³óµµ
°¡ Á¤»óÈ­µÈ 19¸íÀÇ È¯ÀÚ¿¡¼­ ±ÙÄ¡Àû ¹æ»ç¼± Ä¡·á ÈÄ Ç÷Áß ÃÖÀú PSA ³óµµ(nadir PS½Ã´Â
0.2 ³»Áö 1.8ng/§¢·Î Æò±Õ 0.8(¡¾0.5)ng/§¢, Áß¾ÓÄ¡´Â 0.6ng/§¢¿´´Ù. ÃÖÀú PSA ³óµµ¿¡ µµ´ÞÇÏ
´Âµ¥ ¼Ò¿äµÇ´Â ±â°£Àº 6 ³»Áö 23°³¿ù·Î Æò±Õ 13.5(¡¾4.3)°³¿ù, Áß¾ÓÄ¡ 14.0°³¿ùÀ̾ú´Ù. Ä¡·á
ÈÄ ÃßÀû °üÂû Áß 2¸í¿¡¼­ PSA ³óµµ°¡ ÀÓ»óÀû Àç¹ß Áø´Ü 6°³¿ù ¹× 20°³¿ù Àü¿¡ Áõ°¡µÇ¾ú´Ù.
°á ·Ð : Ç÷Áß PSA ³óµµ°¡ ¹æ»ç¼± Ä¡·á ÈÄ 12°³¿ù À̳»¿¡ Á¤»óÈ­µÇÁö ¾Ê´Â °æ¿ì Àü¸³¼±³»
ÀÇ ÀÜ·ù¾ÏÀ̳ª ¿ø°ÝÀüÀ̸¦ ÀǽÉÇÒ ¼ö ÀÖÀ¸¸ç, Ä¡·á ÈÄ ÃßÀû °üÂû ½Ã Àç¹ßÀÇ Á¶±âÁø´Ü¿¡ À¯
¿ëÇÏ´Ù´Â °ÍÀ» ¾Ë ¼ö ÀÖ¾ú´Ù.

Purpose : Prostate specific antigen (PSA) is a useful tumor marker, which is widely
used as a diagnostic index and predictor of both treatment and follow-up result in
prostate cancer. A prospective analysis was carried out to obtain the period of PSA
normalization and the half life of PSA and to analyze the factors influencing the period
of PSA normalization. The PSA level was checked before and serially after radical
radiotherapy.
Materials and Methods : Twenty patients with clinically localized prostate cancer who
underwent radical external beam radiotherapy were enrolled in this study. Accrual period
was from April 1993 to May 1998. Median follow-up period was 26 months.
Radiotherapy was given to whole pelvis followed by a boost to prostate. Dose range for
the whole pelvis was from 45 §í to 50 §í and boost dose to prostate, from 14 §í to 20
§í. The post-irradiation PSA normal value was under 3.0 ng/§¢. The physical
examination and serum PSA level evaluation were performed at 3 month interval in the
first one year, and then at every 4 to S months.
Results :PSA value was normalized in nineteen patients (95%) within 12 months. The
mean period of PSA normalization was 5.3 (¡¾2.¡» months. The half life of PSA of the
nonfailing patients was 2.1 (¡¾0.9) month. The nadir PSA level of the nonfailing patients
was 0.8 (¡¾0.5) ng/§¢. The period of PSA normalization had the positive correlation with
pretreatment PSA level (R2=0.468). The nadir PSA level had no definite
positive correlation with the pretreatment PSA level (R2=0.175). The half
life of serum PSA level also had no definite correlation with pretreatment PSA level
(R2=0.029).
Conclusion ; The PSA level was mostly normalized within 8 months (85%). If it has
not normalized within 12 months, we should consider the residual disease in prostate or
distant metastasis. In 2 patients, the PSA level increased 6 months or 20 months before
clinical disease was detected. So the serum PSA level can be used as early diagnostic
indicator of treatment failure.

Å°¿öµå

Àü¸³¼±¾Ï; ±ÙÄ¡Àû ¹æ»ç¼± Ä¡·á; Àü¸³¼±Æ¯ÀÌÇ׿ø(PSA); PSA ³óµµ ¹Ý°¨±â; ÃÖÀú PSA ³óµµ; Prostate cancer; Radical radiotherapy; Prostate specific antigen (PSA); PSA half life; Nadir PSA level;

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