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: 
Hospital Course:

The patient was a 68-year-old male with metastatic CRPC who presented with severe lethargy one month after treatment with abiraterone. The patient received docetaxel and prednisone initially, but the treatment was interrupted due to severe fatigue. Abiraterone and prednisone were initiated thereafter. The patient had a history of chronic heart failure, and received furosemide. Laboratory and endocrinology findings revealed decreased levels of potassium and cortisol and elevated levels of ACTH. The patient was diagnosed with hypokalemia associated with abiraterone therapy.

Hospital Course Summary:

Admission History and Physical:

The patient, a 68-year-old male with metastatic CRPC, was admitted to the hospital with a chief complaint of severe lethargy. The patient had a history of chronic heart failure and had been treated with docetaxel and prednisone followed by abiraterone and prednisone. Laboratory and endocrinology findings revealed decreased levels of potassium and cortisol and elevated levels of ACTH. The patient was diagnosed with hypokalemia associated with abiraterone therapy.

Hospital Course:

The patient was treated with potassium supplementation and an increase in prednisone. After seven days of potassium supplementation therapy, the levels of plasma ACTH and serum potassium were normalized; however, cortisol was still at reference value or lower. At 14 days, plasma cortisol was also normalized. The patient was discharged on oral prednisone, 20 mg daily.

Hospital Course Summary:

Treatment and Consultation:

The patient was treated with potassium supplementation and an increase in prednisone. The levels of plasma ACTH and serum potassium were normalized after seven days of therapy. At 14 days, plasma cortisol was also normalized. The patient was discharged on oral prednisone, 20 mg daily.

Discharge Medications:

Oral prednisone, 20 mg daily.

Follow-up:

The patient is advised to follow up with their primary care physician for ongoing management of their chronic heart failure.

 CRPC, was diagnosed with a metastatic CRPC