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Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion

  • Authors:
    • Dongsheng Zhu
    • Jingyuan Cao
    • Chao Zhi
    • Tao Guo
    • Yuhong Li
    • Zhiqiang Lang
    • Gang Li
  • View Affiliations / Copyright

    Affiliations: Department of Urology, Tianjin Institute of Urology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China, Department of Urology, Binzhou Medical University Hospital, Binzhou, Shandong 256600, P.R. China, Department of Pathology, The People's Hospital of Liaocheng, Liaocheng, Shandong 252000, P.R. China, Department of Pathology, Yuhuangding Hospital of Qingdao University, Yantai, Shandong 264000, P.R. China
    Copyright: © Zhu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1721-1726
    |
    Published online on: January 9, 2020
       https://doi.org/10.3892/ol.2020.11281
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Abstract

In the current Tumor-Node-Metastasis (TNM) classification system for renal cell carcinoma (RCC), both perinephric fat invasion (PFI) and renal sinus fat invasion (SFI) are classified at the T3a stage. However, their associated prognoses are clinically controversial. The present study proposes a new sub-classification criterion for pathological T3a (pT3a) RCC with SFI or PFI to resolve this dispute. Data were collected from consecutive records of 2,765 patients with T1a renal cancer, who had undergone partial nephrectomy (PN) between 2001 and 2015 at one of four hospitals. Among these patients, 127 cases were diagnosed with stage pT3a RCC with SFI or PFI, according to final pathological examination. The pathological characteristics, clinical data and follow-up observations were analyzed. Of the 127 patients, with an average follow-up duration of 56 months (range, 15-60 months), 17 cases of tumor recurrence were found. After analysis of the pathological findings, the following new sub-classification criteria was proposed for pT3a RCC with SFI or PFI: i) Type A, renal tumor invades the pseudo-capsule and contacts with the perinephric adipose tissues directly (3 recurrences out of 57 patients); ii) type B, tumor protrudes into the perinephric adipose tissues like a tongue (4 recurrences out of 29 patients); and iii) type C, tumor nodules distribute in perinephric adipose tissues (10 recurrences out of 41 patients). There was statistically significant difference between the three subtypes in terms of recurrence rate (P=0.023). In conclusion, controversies remain in the current TNM classification system for pT3a RCC. The present study added to the available data and found that pT3a RCC with tumor nodules in perinephric adipose or/and with an irregular tumor protruding into adipose tissues showed a higher recurrence rate. Thus, it is recommended that pT3a RCC should be carefully analyzed and should be considered differently to other stages of RCC.
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Copy and paste a formatted citation
Spandidos Publications style
Zhu D, Cao J, Zhi C, Guo T, Li Y, Lang Z and Li G: Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion. Oncol Lett 19: 1721-1726, 2020.
APA
Zhu, D., Cao, J., Zhi, C., Guo, T., Li, Y., Lang, Z., & Li, G. (2020). Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion. Oncology Letters, 19, 1721-1726. https://doi.org/10.3892/ol.2020.11281
MLA
Zhu, D., Cao, J., Zhi, C., Guo, T., Li, Y., Lang, Z., Li, G."Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion". Oncology Letters 19.3 (2020): 1721-1726.
Chicago
Zhu, D., Cao, J., Zhi, C., Guo, T., Li, Y., Lang, Z., Li, G."Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion". Oncology Letters 19, no. 3 (2020): 1721-1726. https://doi.org/10.3892/ol.2020.11281
Copy and paste a formatted citation
x
Spandidos Publications style
Zhu D, Cao J, Zhi C, Guo T, Li Y, Lang Z and Li G: Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion. Oncol Lett 19: 1721-1726, 2020.
APA
Zhu, D., Cao, J., Zhi, C., Guo, T., Li, Y., Lang, Z., & Li, G. (2020). Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion. Oncology Letters, 19, 1721-1726. https://doi.org/10.3892/ol.2020.11281
MLA
Zhu, D., Cao, J., Zhi, C., Guo, T., Li, Y., Lang, Z., Li, G."Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion". Oncology Letters 19.3 (2020): 1721-1726.
Chicago
Zhu, D., Cao, J., Zhi, C., Guo, T., Li, Y., Lang, Z., Li, G."Prognostic significance of the sub-classification of stage pT3a renal tumors by perinephric and sinus fat invasion". Oncology Letters 19, no. 3 (2020): 1721-1726. https://doi.org/10.3892/ol.2020.11281
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