顔面神経温存を優先した耳下腺癌治療の検討  [in Japanese] Parotid Gland Cancer Treatment with Facial Nerve Preservation  [in Japanese]

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Abstract

過去11年間に当科で治療した耳下腺癌症例34例について検討した.T1/2/3/4aが5例/12/7/10, N0/1/2が25例/3/6, stage I/II/III/IVが5例/10/6/13であった. 病理組織型は, 多形腺腫由来癌が9例, 腺癌が8例の他, 計10種類の組織型を認めた. 同期間の良性腫瘍98例を含め, 穿刺吸引細胞診 (FNA) の有用性を検討したところ, 感度76.0%, 特異度95.4%, 良悪性の正診率91.1%であり, 過去の報告と同等であったが, 4例の偽陽性と, 6例の偽陰性を認め, FNAの結果のみで悪性腫瘍と判定し, 顔面神経の処置を決定するのは危険なことが判明した. 悪性腫瘍29例に手術を施行した. 顔面神経は可能な限り温存を試み, 15例で全5枝を温存した. 悪性腫瘍で, 顔面神経浸潤が疑われる症例, リンパ節転移陽性, 高悪性度の症例, 切除断端陽性の15症例に対して, 術後放射線照射を施行し, そのうち3例に再発を認めた. 手術不能例5例に対しては, 化学放射線同時併用療法または放射線単独照射を行ったが, 現在まで全例生存している. 5年overall survival (OS) は87.4%, 5年progression free survival (PFS) は71.4%であった. stage分類別5年PFSは, stage I/II: 91.7% (stage I: 100%, stage II: 87.5%), stage III/IV: 51.6% (stage III: 50%, stage IV: 47.9%) で, 両者の間には有意差が認められた. またN分類別5年PFSでも, N0: 86.2%, N+: 38.1% (N1: 66.7%, N2: 20.8%) で, 両者の間には有意差が認められた.

Based on clinical features in 34 cases of parotid gland cancer treated between January 1997 and December 2007, tumor, node, and metastasis classification found 5 subjects to be T1, 12 to be T2, 7 to be T3, and 10 to be T4a. Of these, 25 were staged for N0, 3 for N1, and 6 for N2. Histopathologically, 10 different tumor types were observed, with carcinoma ex pleomorphic adenoma the most common. Preoperative fine-needle aspiration cytology (FNAC) of parotid gland tumor was done on 126 and cytological findings compared to histopathologic diagnoses of surgically resected specimens. Sensitivity for malignancy was 76.0%, specificity 95.4%, and overall accuracy 91.1%. Six malignant tumors were diagnosed as benign and 4 benign as malignant by FNAC, indicating that FNAC results alone may not be sufficient for diagnosing malignancy definitively. Among subjects, 25 underwent surgical resection, with the facial nerve preserved in 15 of 29. Postoperative radiotherapy was indicated if lymph node metastasis, intermediate or high-grade malignancy, or positive margins were seen. Of 15 subjects undergoing postoperative radiotherapy, 3 experienced recurrence. For unresectable tumors, concurrent chemoradiotherapy was used for 3 subjects and 2 underwent radiotherapy alone, with all 5 current survivors. The 5-year overall survival (OS) was 87.4% and progression-free survival (PFS) 71.4%. In terms of 5-year PFS, significant differences were seen between stage I/II (91.7%) and stage III/IV (51.6%)(P=0.032), and between N0 (86.2%) and N+(38.1%)(P=0.002).

Journal

  • Nippon Jibiinkoka Gakkai Kaiho

    Nippon Jibiinkoka Gakkai Kaiho 113(3), 115-122, 2010-03-20

    The Oto-Rhino-Laryngological Society of Japan, Inc.

References:  26

Cited by:  1

Codes

  • NII Article ID (NAID)
    10026280041
  • NII NACSIS-CAT ID (NCID)
    AN00191551
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00306622
  • NDL Article ID
    10643874
  • NDL Source Classification
    ZS43(科学技術--医学--耳鼻咽喉科学)
  • NDL Call No.
    Z19-250
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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