Long survival of a young patient with Xp11.2 translocation metastatic clear cell renal carcinoma: case report and review of the literature

Introduction: Xp11.2 translocation is a rare subtype of renal cell carcinoma (RCC), identified as a single entity only from 2004 by World Health Organization (WHO). These tumors involve pediatric age group and rarely patients over 40 years old. Children show indolent disease; adult population has invasive tumor at diagnosis with rapid progression. Case report: We describe a case report of a young woman affected by metastatic clear cell renal carcinoma with Xp11.2 translocation. She achieved a longer stable disease (SD) to first line treatment with atezolizumab plus bevacizumab, obtaining a progression free survival (PFS) of 21 months. After she received cabozantinib, sunitinib and then sorafenib. Conclusions: The patient had an overall survival (OS) of 51 months, which is much higher than that reported in literature data. Unfortunately, the biology of Xp11.2 translocation RCC and its therapeutic management are still unclear.