Hello- 70-year-old male diagnosed in Aug 2024 with high-risk non-muscle invasive bladder cancer (NMIBC), initially presented with positive urine cytology and FISH but no visible lesions in all manner of imaging or cystoscopy (suggestive of occult carcinoma in situ)? I completed a full 6-week BCG induction course and tested negative 3 months later with cytology and Fish. I had my first 3-week BCG maintenance cycle, now 4 weeks post-maintenance and current cystoscopy remains clean, cytology showing atypia (BCG induced inflammatory response?) and FISH negative. All of the aforementioned was with my urologist. I have had an initial appt. with a urologic medical oncologist/hematologist with Dana Farber. I am to have another MRI Pelvis before the next visit and bloodwork. I didn't think to ask at the first appt. but would guess checking for possible ctDNA. Barring any change I am scheduled for cysto/cytol every 3 months and 3 weekly BCG every 6 months.