(A) Tumor organoids derived from BBN-induced bladder tumors were infected using a lentivirus containing shRNA targeting Shh or Bmpr1a. The resulting organoids were injected intramurally into the dome of the bladder, and the mice (15 animals in total) were treated with 5’-azacitidine for 2 weeks. The gene discussed is BMPR1A; the disease is urinary bladder neoplasm.