A new combined index of SUVmax of lymph node in PET/CT by a weighting coefficient plus its maximum minor axis in CECT to evaluate occult lymph node metastasis in clinical N0 patients with tongue cancer

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Bibliographic Information

Title
A new combined index of SUVmax of lymph node in PET/CT by a weighting coefficient plus its maximum minor axis in CECT to evaluate occult lymph node metastasis in clinical N0 patients with tongue cancer
Other Title
  • リンパ節のPET/CTによるSUVmaxに重み付け係数を乗じてCECTの最大短径を加えた新しいcombined indexによる舌癌の臨床的N0症例の潜在的リンパ節転移の評価
  • Combined index to evaluate N0 neck
Author
Kanamura, Ryo
Alias Name
  • 金村, 亮
  • カナムラ, リョウ
Author
Suzuki, Motoyuki
Alias Name
  • スズキ, モトユキ
  • スズキ, モトユキ
Author
Otozai, Shinji
Alias Name
  • オトザイ, シンジ
  • オトザイ, シンジ
Author
Yoshii, Tadashi
Alias Name
  • ヨシイ, タダシ
  • ヨシイ, タダシ
Author
Okamoto, Hidehiko
Alias Name
  • オカモト, ヒデヒコ
  • オカモト, ヒデヒコ
Author
Kitamura, Yoshiaki
Alias Name
  • 北村, 嘉章
  • キタムラ, ヨシアキ
Author
Abe, Koji
Alias Name
  • 阿部, 晃治
  • アベ, コウジ
Author
Fujii, Takashi
Alias Name
  • フジイ, タカシ
  • フジイ, タカシ
Author
Takeda, Noriaki
Alias Name
  • 武田, 憲昭
  • タケダ, ノリアキ
University
徳島大学
Types of degree
博士（医学）
Grant ID
甲医第1491号
Degree year
2021-03-17

Description

To predict occult nodal metastasis in clinical N0 patients with tongue cancer, we developed combined index (CI) : SUVmax of the largest lymph node in PET/CT by weighting coefficient plus its maximum minor axis (< 10 mm) in contrast-enhanced CT (CECT). In this retrospective study, 57 clinical N0 patients with tongue cancer, who underwent elective supraomohyoid neck dissection at cervical levels of I-III were enrolled. The cutoff value of SUVmax of 2.0 obtained using receiver operating characteristic (ROC) analysis predicted the postoperative positive cervical levels containing metastatic lymph nodes from clinical N0 cervical levels in tongue cancer patients with a sensitivity of 54.5% and a specificity of 78.2%. The cutoff value of CI with weighting coefficient of 1.5 obtained using ROC analysis was 9.8 at the maximum area under the curve of 0.750. The cutoff value of 9.8 predicted the postoperative positive cervical levels containing metastatic lymph nodes from clinical N0 cervical levels in tongue cancer patients with a sensitivity of 68.2% and a specificity of 81.5%. These findings suggest that CI of functional PET/CT and morphological CECT components might improve the diagnostic performance of occult nodal metastasis to select clinical N0 patients with tongue cancer preferable for elective neck dissection.

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