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: 55-year-old, right-hand-dominant male

Admission Date: [Insert date]
Discharge Date: [Insert date]

Hospital Course Summary:

The patient presented with a history of acute inflammatory demyelinating process and a 3-month history of a left volar wrist and hypothenar soft tissue mass. Initially, his sensory deficits were thought to relate to his generalized demyelinating disorder. However, on examination, the ulnar deficit was thought to be related to the mass in his hand.

Magnetic resonance angiography of the left hand showed a soft-tissue mass of unclear etiology. Operative excision was performed under general anesthesia. Grossly, the mass was tan-white, rubbery, and lobulated. Pathology confirmed the mass to be a benign myxoma. There were no postoperative complications.

At 5 weeks postoperatively, the patient reported marked improvement in his numbness and weakness. He was found to have intact sensation in the ulnar nerve distribution distal to the site of the excised mass, and improved grip strength.

Follow-up:

The patient was asked to return in several months for repeat sensorimotor assessment but was subsequently lost to follow-up.

Diagnosis:

Benign myxoma.

Summary:

The 55-year-old, right-hand-dominant male with a history of acute inflammatory demyelinating process and a 3-month history of a left volar wrist and hypothenar soft tissue mass presented for evaluation. Operative excision was performed, and the pathology confirmed the mass to be a benign myxoma. The patient reported marked improvement in his numbness and weakness at 5 weeks postoperatively.

 He did not have any swelling or the loss of muscle