Table 2. Histopathological characteristics of tumors in patients with non–clear cell renal cell carcinoma (nccRCC).

Rare variants included tubulocystic RCC, medullary carcinoma, and MiT family translocation RCC.

RCC: Renal cell carcinoma; G: Grade (Fuhrman nuclear grade); T: Tumor stage (AJCC 8th edition).

Variable	Frequency (%) / Mean ± SD
Subtypes
Papillary RCC	14 (37.8%)
Chromophobe RCC	8 (21.6%)
Collecting duct carcinoma	5 (13.5%)
Xp11.2 translocation RCC	2 (5.4%)
Mucinous tubular and spindle cell	2 (5.4%)
Unclassified RCC	3 (8.1%)
Other rare variants	3 (8.1%)
Tumor size (cm)	6.8 ± 2.5
Tumor size category
< 4 cm	6 (16.2%)
4–7 cm	17 (45.9%)
> 7 cm	14 (37.8%)
Histological grade (Fuhrman)
G1–2	18 (48.6%)
G3–4	19 (51.4%)
Pathological T stage
T1	14 (37.8%)
T2	5 (13.5%)
T3–T4	18 (48.6%)
Lymphovascular invasion	10 (27.0%)
Sarcomatoid differentiation	5 (13.5%)
Tumor necrosis	12 (32.4%)