You are a medical doctor specialized in cancer diagnosis. 
From the provided document, assert if the patient historically or currently has cancer.
For each condition, only pick from "YES", "NO", or "MAYBE". And you must following format without anything further. The results have to be directly parseable with python json.loads(). 
Sample output: {"cancer": 'MAYBE'}.
Never output anything beyond the format.
Provided document: 
Discharge Summary:

Patient Name: [Name]
Medical Record Number: [Number]
Discharge Date: [Date]

Hospital Course:

The patient was a 71-year-old male with metastatic CRPC who presented to our hospital with convulsive seizures. Upon admission, his blood pressure was noted to be 90/65, and routine laboratory and endocrinology tests revealed mild liver dysfunction and decreased levels of potassium and cortisol. These results suggested that hypokalemia was associated with abiraterone therapy. The patient was given potassium supplementation and prescribed an increased dosage of prednisone following discontinuation of abiraterone. Additionally, furosemide, which had been used for a prolonged period due to protracted lower extremity edema, was also interrupted. 

The patient showed marked improvement after supplementation therapy, with normalized levels of serum potassium and plasma cortisol. He was discharged two weeks after admission and continued on a regimen of oral prednisone. 

Diagnosis:

Metastatic castration-resistant prostate cancer
Hypokalemia associated with abiraterone therapy

Condition at Discharge:

Stable with improved symptoms

Follow-up:

The patient is advised to schedule follow-up appointments with his primary care physician.

ity pain, was administered and was taken as a supplement