What adjuvant therapy, if any, is best for mucinous tubular and spindle cell carcinoma of the kidney?

Mucinous tubular and spindle cell carcinoma (MTSCCC) of kidneys is a rare RCC variant which was first described in WHO 2024 updates of the classification of RCC (Moch et al., PMID 35853783). Most cases are diagnosed incidentally and typically have an indolent course with good long-term prognosis (Ku...