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- Title
Tumor–stroma ratio can predict lymph-node metastasis in cT1/2N0 oral tongue squamous cell carcinoma independent of tumor budding grade.
- Authors
Sakai, Toshihiko; Saito, Yuki; Tateishi, Yoko; Yamazawa, Sho; Fukuoka, Osamu; Kobayashi, Kenya; Omura, Go; Akashi, Ken; Yoshida, Masafumi; Ando, Mizuo; Ebihara, Yasuhiro; Yamasoba, Tatsuya
- Abstract
Background: cT1/2 oral tongue squamous cell carcinoma (OTSCC) often metastasizes to cervical lymph nodes. However, predicting neck lymph-node metastasis (NLM) remains challenging. Pathomorphological evaluation of tumor budding grade (TBG) and tumor–stroma ratio (TSR) reportedly can predict lymph-node metastases. Hence, this study aimed to evaluate TBG and TSR in OTSCC and investigate their relationship to occult NLM and cancer relapse. Methods: Clinicopathological data of patients with cT1/2N0 OTSCC treated at the University of Tokyo Hospital between 2007 and 2017 were collected. TBG and TSR were evaluated using hematoxylin–eosin staining and cytokeratin AE1/AE3 immunostaining. Results: Out of 70 patients, 16 underwent elective neck dissection in addition to primary-tumor resection, whereas 54 did not. During follow-up, NLM was found in 35 patients. NLM correlated with the pathological depth of invasion (pDOI) (p < 0.001), TBG (p = 0.008), and TSR (p < 0.001) in univariate analysis and pDOI (p = 0.01) and TSR (p = 0.02) in multivariate analysis. The 5-year recurrence-free survival rate (RFS) was 78% for patients with a pDOI ≤ 5 mm and stroma-poor tumors and 33% for patients with a pDOI > 5 mm and stroma-rich tumors. Conclusion: Patients with a pDOI > 5 mm and stroma-rich tumors have a high risk for cancer relapse. TSR and pDOI may be promising NLM predictors in cT1/2N0 OTSCC.
- Subjects
TUMOR budding; SQUAMOUS cell carcinoma; TUMOR grading; CANCER relapse; TONGUE
- Publication
International Journal of Clinical Oncology, 2022, Vol 27, Issue 12, p1818
- ISSN
1341-9625
- Publication type
Article
- DOI
10.1007/s10147-022-02249-y