Prognostic significance of subclassifying stage pT3a renal tumors with fat invasion: a retrospective study of 99 patients

Abstract

Purpose To analyze the recurrence in patients with clinic stage T1 renal cell carcinoma (RCC) who were upstaged to stage T3a after partial nephrectomy (PN) using a new sub-classification criterion. Methods A retrospective study of pathological characteristics was performed in patients who were upstaged to pT3a on the basis of fat invasion (FI). Results After analyzing the pathological findings, we proposed the following new sub-classification criteria for pT3a RCC with FI: (1) renal tumor invades the pseudo-capsule and contacts the perinephric adipose tissue directly or the tumor protrudes into the perinephric adipose tissue like a tongue (Type A); and (2) tumor nodules are distributed in perinephric adipose tissues (Type B). A significant difference was observed in the recurrence rate between the two subtypes A and B. For Type B, the recurrence rate after radical nephrectomy (RN) and PN was 15.79% and 63.64%, respectively. The recurrence rates for Types A and B after PN were 11.11% and 63.64%, respectively. Conclusions T3a RCC with tumor nodules in perinephric adipose and/or an irregular tumor protruding into the adipose tissues lead to a higher recurrence rate. We recommend that T3a RCC be carefully analyzed and patients be treated on an individual basis.

Clinicopathologic Characteristics of Renal Cell Carcinoma in Prof. dr. I.G.N.G. Ngoerah General Hospital 2018 – 2022

“…Type C included pT3a tumors which had nodules distributed in the perinephric adipose tissues. There were significant differences in the recurrence rate among these three proposed criteria with type B and C being more recurrent in nature (Xu & Zhu, 2021;D. Zhu et al, 2020).…”

FBLN5 as One Presumably Prognostic Gene Potentially Modulating Tumor Immune Microenvironment for Renal Clear Cell Carcinoma in Children and Young Adults

“… 1 Renal clear cell carcinoma (KIRC) is the most frequent subtype of kidney cancer and accounts for more than 70% of all cases. 2 However, the most common neoplasm of the kidney is nephroblastoma in childhood, and KIRC is rare in children and young adults. 3 Fewer than 4% of renal tumors in children are KIRC.…”