Overtaking Intra and Inter Tumoral Heterogeneity In Von Hippel-Lindau Related Renal Cancer

It was hypothesized that the high intra- inter-tumor heterogeneity of sporadic ccRCC also defines VHL-ccRCCs, including different lesions within individual patients, and it was assumed that decoding VHL-ccRCC heterogeneity by coupling imaging, histology and molecular profiling of multiregional biopsies would help improve diagnostic tests and therapeutic choices for VHL patients.

In order to comprehensively map intra and inter tumor heterogeneity of ccRCC in VHL patients, the aims of the study are:

• To integrate pre-surgery imaging using conventional multiparametric MRI with tumor histology of geographical predeterminated multi-region biopsies in each ccRCC of VHL patients.
• To combine multiplex immunohistochemistry, bulk and single cell RNA sequencing and somatic mutations analysis with pan-tumor histological assessment.
• To optimize a protocol to generate VHL-ccRCC-derived tumor organoids (patient-derived organoids, PDO) and test anti tumor agents like HIF2alpha inhibitor in organoid cultures representative of intra- and inter-tumor heterogeneity.

This study will develop standardized models for diagnosis and molecular characterization of ccRCC in VHL disease using a combination of imaging, intrasurgical biopsying and multi-omics analysis. It will benefit of a clinical and research program devoted to VHL disease established at OSR in 2021 that centralizes Italian VHL patients. Since the current study relies on tumor biopsy techniques that are already established in clinical practice, the translational findings will be directly available and immediately affecting patients' care.

Inclusion criteria

• VHL syndrome
• Presence of at least 3 kidney tumors larger that 3cm to be surgically removed

Exclusion criteria

• Absence of VHL
• Quantity of kidney tumors < 3
• Absence of surgery performance