<prompt> Spontaneous regression of malignant tumor is feature of -NeuroblastomaRenal cell carcinomaBurkitt s lymphomaWilms tumour  <response>: Ans. is a i.e., Neuroblastoma Both, Neuroblastoma and Renal cell carcinomas show spontaneous regression. But, the answer is Neuroblastoma because it has greater tendency to regress spontaneously than renal cell carcinoma. 