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Is preoperative ultrasonography accurate in measuring tumor thickness and predicting the incidence of cervical metastasis in oral cancer? Oral Oncol 2010;46:38-41

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口腔病理科 On-Line KMU Student Bulletin

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原文題目(出處): Is preoperative ultrasonography accurate in measuring tumor thickness and predicting the incidence of cervical metastasis in oral cancer? Oral Oncol 2010;46:38-41

原文作者姓名: Taylor SM, Drover C, MacEachern R, Bullock M, Hart R, Psooy B, Trites J

通訊作者學校: Division of Otolaryngology-Head and Neck Surgery, Dalhousie University, Halifax, Nova Scotia, Canada

報告者姓名: R1謝牧諺 報告日期: 99/05/10 內文:

Summary:

 早期口腔癌病患需不需要接受頸部淋巴清創, 是一個受爭論的話題, 術前 對無臨床症狀的淋巴轉移風險的評估是有幫助的

 有研究指出, 組織切片的tumor深度和lymph node是否有轉移有很大的關

 本 文 有 21 位 經 病 理 切 片 檢 查 診 斷 為 SCC 的病 患 ( 包 括 tongue, floor of mouth), 每一個病患都有接受術前超音波檢查

 超音波檢查的結果, 和組織病理切片的結果有正相關

 Tumor depth<5mm, neck轉移的機率0%

 Tumor depth>=5mm, neck轉移的機率65%

Introduction

 Stage I的口腔癌治療方式, 通常是切除源發腫瘤及臨床追蹤

 研究指出, stage I/II發生頸部轉移的機率有42%

 所以預測淋巴轉移的方式, 對於決定是否進行選擇性頸部淋巴青創是很重 要的

 很多因素都是評估頸部淋巴轉移的條件, 包括tumor的stage. 形狀. 厚度.

血管. 淋巴管. 神經的侵犯

 很多研究指出, tumor的厚度和頸部淋巴轉移的風險, 發現有正相關

 最近Yuen這位學者指出tumor的厚度是唯一和淋巴轉移有關的因素

 Shintani用ultrasonography評估tongue CA的厚度, 研究的結果也顯示有明 顯的正相關

Material and Methods:

 21個有oral CA的病患

 病人都被確診為SCC, 且接受標準的治療過程

 所有病人中, T1的病人不會接受頸部淋巴清創, T2及更大的lesion則會進行單 側的selective neck dissection

 全部的組織切片都是由同一位病理科醫師判讀, 且不知道超因波檢查的結 果

 而且接受口內超音波的檢查, 頻率為10-12MHz

 在transducer上塗上gel, 且在probe外面套上latex sheath

 Probe直接放在tumor上, 由同一位技術員操作

 由tumor的表面測量的tumor最深處

Result:

 總共有12 male, 9 female

 Age: from 48-78 y/o(平均65y/o)

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 Tumor的厚度從0-30mm(平均11mm)

 而且淋巴轉移的病患, 厚度則可達到15.6mm

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在lymph node negative的group, 有8/10是T1/T2(80%), 在lymph node positive的 group, 只有3/11是T1/T2(27%)

 全部的轉移機率為11/21(52%)

 最小的厚度在有頸部淋巴轉移的病患為5mm

 四個T1N0的病患中, 平均厚度是2.25mm, 後來有一位有淋巴轉移的情形, 他的厚度是6mm

Discussion:

 可以看出tumor的厚度和頸部淋巴轉移有正相關

 目前一系列的研究, 我們知道超因波的檢查是相當精確而且可以和組織切 片對照的

 誤差的部份

 1mm以內(17/21, 80%)

 2mm以內(20/21, 93%)

 >2mm(1/21)

 之前CT. MRI都已經被拿來進行厚度的預測, 但5mm以下的lesion不能達到 很精確的效果

 本篇study和之前的study的結果相同

Conclusion:

 口腔癌中tumor厚度可以明顯的預測頸部淋巴轉移

 本文支持超因波檢查是一個很精確檢查tumor厚度的方式

 作者認為要不要進行頸部淋巴清創的標準是深度達5mm

題號 題目

1 請問位於mouth floor的SCC, 容易轉移到哪個部份的LN?

(A) Submental (B) Submandibular (C) Jugulodigastric (D) Preauricular

答案(A) 出處:Oral and Maxillofacial PATHOLOGY, third edition p417

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題號 題目

2 請問要進行頸部淋巴清創的tumor的最小深度條件是多少?

(A) 1mm (B) 5mm (C) 10mm (D) 15mm

答案(B) 出處:Oral Oncology 46 (2010) 38–41

Oral and Maxillofacial PATHOLOGY, third edition p417

參考文獻

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