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  • 學位論文

前導性治療對於乳癌病人,會增加粗針切片與手術檢體之間的荷爾蒙受器,Her-2,Ki-67,以及乳癌亞型的改變比例

Neo-adjuvant Therapy Increase Immunohistochemistry Status Discordance Rate and Subtype Change between Core Needle Biopsy and Surgical Excision Specimen

指導教授 : 葉名焮

摘要


研究目的:治療乳癌,藥物治療(化學治療、標靶治療、荷爾蒙治療)是除了手術切除以外非常重要的一環。近年來,化療被分為在手術前的前導性化療以及手術後的輔助性化療。前導性化療/標靶治療的藥物選擇通常是根據診斷的超音波導引下的粗針切片,經病理確認後的Estrogen receptor(ER),progesterone receptor(PR),Her-2(Human epithelial receptor-2)陽性/陰性,Ki-67所決定。我們發現病人在做完前導性化療之後,相較於沒有前導性化療的病人,有比較高的比例會發生ER,PR,Her-2改變,進而產生乳癌亞型改變,甚至可能會改變病人術後用藥的狀況。本研究宗旨在於比較乳癌病人分別在有沒有接受前導性治療的狀況下,對於乳癌各種表面抗原改變,以至於影響亞型的影響。 研究方法與資料:本研究採回溯世代的設計方式,納入從2013到2017,在中山用粗針切片診斷,同時在本院接受乳房全切除/腫瘤切除的病人。篩選條件是cT1~T3,cN0~N1。我們會先把病人分為有接受前導性治療,或者沒有接受前導性治療進行比較。再把兩組各分成沒有造成乳癌亞型改變,以及有乳癌亞型改變的兩組進行交叉比較。沒有用前導性化療的病人共115人,有接受前導性化療的病人共72人。會比較病人Estrogen receptor(ER),progesterone receptor(PR),Her-2及Ki-67的一致率(concordance rate)以及不一致性(discordance rate)。另外還有根據ER,PR,Her-2,Ki-67,分類腫瘤的亞型為Luminal A(HR+,Her-2-,low ki-67),Luminal B1(HR+,Her-2-, high ki-67),Luminal B2(HR+, Her-2+),Her-2(HR-,Her2+)以及三陰性(HR-, Her-2-)。 研究結果:在未接受前導性治療的病人中,粗針切片與手術檢體的ER,PR,her-2 concordance rate各有99.1%,94.8%,100%。Ki-67則是73.9%。其中有亞型轉換的病人有23.5%(n=27/115)。在有接受前導性治療的病人中,粗針切片與手術檢體的ER,PR,her-2 concordance rate各有 98.6%,72.2%,91.7%。Ki-67則是58.3%。Ki-67的改變,和粗針切片對比,有約一半是手術檢體上升,一半是下降。其中有亞型轉換的病人共25人,佔34.7%(n=25/72)。 結論:從沒有接受前導性化療的病人中可以看出,ER,PR,her-2的準確性是值得信賴的,也鮮少會改變乳癌亞型分類。但Ki-67就變化很大。有接受前導性治療的病人中,PR及Her-2可能會因為前導性治療的關係而改變,Ki-67改變則可能因為化療的關係普遍是下降。 粗針切片是一個對於乳癌分亞型相當可靠的工具,唯獨在ki-67部分,應該建立更規格化的檢驗機制,來證明粗針切片的ki-67是值得信賴的數值。而有接受過前導性化療的病人,PR和Her-2有較高的比例受到影響,臨床上對於此類HR或者Her-2轉換的病人,應該有更多的數據研究,對於病人後續的治療是否有影響。

並列摘要


Background: Neoadjuvant therapy (NAT)is a sufficient and safe treatment plan for breast cancer. However, discordance of immunohistochemistry(IHC) between core needle biopsy(CNB) and surgery specimen has been reported. And NAT seems to increase the discordance rate of CNB and surgery specimen. We aim for collect IHC data of breast cancer in breast cancer patients with or without NAT. Material and Method: We collect the early breast cancer from Chung-Shan Hospital from 2012 to 2017. There are 115 patients in no-NAT group and 72 patients in NAT group. We analyze the IHC of breast cancer tissue of CNB and surgery specimen. And record and discordance of all IHC(Estrogen receptor, progesterone receptor, Her-2 and Ki-67) and subtype change. Results: The patient who didn’t receive NAT showed high concordance rate of estrogen receptor(ER), progesterone receptor(PR) and her-2. Concordance rate in no-NAT group of ER: 99.1%, PR: 94.8%, Her-2:100%, Ki-67:73.9%. Concordance rate in NAT group of ER: 98.6%, PR: 72.2%, Her-2:91.7%, Ki-67:58.3%. Subtype change in non-NAT group happen in 23.5% of patients, while 36.1% of patients experienced subtype change. Conclusion: NAT increase the discordance rate of IHC and subtype of breasts cancer. IHC change happen more in PR, Her-2 and Ki-67. Clearer treatment plan should be clarified.

參考文獻


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