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: 42-year-old Caucasian male

Admission Date: TBD

Discharge Date: TBD

Hospital Course:
The patient was admitted with rapidly progressive gait disturbance, lower extremity weakness, and ascending hypoesthesia. The nerve conduction studies showed a proximal demyelinating sensorimotor polyneuropathy with active denervation, prolonged motor distal latency, and a reduction in the motor conduction velocity in N. medianus and N. ulnaris. The cerebrospinal fluid (CSF) revealed albuminocytologic dissociation with an elevated protein level. The patient was diagnosed with typical CIDP (chronic inflammatory demyelinating polyneuropathy) and treated with IVIg therapy with significant improvement.

During follow-up, the patient complained of increasing physical exhaustion, reduction in walking distance, and worsening of residual dysphagia. The patient was found to have MG (Myasthenia gravis) due to the positive AChR (Acetylcholine receptor) antibodies, titin antibodies, and abnormal decrement seen on repetitive nerve stimulation. The patient received pyridostigmine and had the anterior mediastinal mass confirmed to be a thymoma.

The patient was maintained on long-term immunosuppression with azathioprine and prednisone in addition to IVIg therapy, which improved dysphagia, dysarthria, and gait unsteadiness. The patient was later diagnosed with anti-phospholipase A2 receptor antibody-positive membranous glomerulonephritis, a common cause of nephrotic syndrome, and was treated appropriately. Despite being hospitalized for a year due to critical illness complicated by sepsis, the patient ultimately recovered from myasthenic crisis and regained partial autonomy.

Diagnosis:
1. Typical CIDP (chronic inflammatory demyelinating polyneuropathy)
2. MG (Myasthenia gravis)
3. Anti-phospholipase A2 receptor antibody-positive membranous glomerulonephritis

Treatment:
1. IVIg therapy
2. Long-term immunosuppression with azathioprine and prednisone
3. Pyridostigmine therapy
4. Thymectomy

Follow-up:
The patient will continue to follow up with the healthcare team regularly for monitoring of their conditions and treatment efficacy.

 and was treated with an immunoagulation therapy.