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: [Redacted]
Age: 49
Sex: Male
Date of Admission: [Redacted]
Date of Discharge: [Redacted]
Admitting Diagnosis: Bruxism

Hospital Course

The patient presented with complaints of snoring, daytime fatigue, clenching and grinding of the teeth, perceived increased masseter muscle tension, dissatisfaction with his quality of sleep, and pain located bilaterally in masseter muscles and area of temporomandibular joints. Medical history was significant for hypertension, psoriasis, and Barrett’s esophagus. Dental examination confirmed malocclusion, dental crowding, excessive overbite, teeth midline deviation, and high Tooth Wear Index. The patient was diagnosed with severe sleep and awake bruxism.

Laboratory tests revealed lowered concentration of HDL cholesterol, slight hypertriglyceridemia, and slightly increased fasting glucose levels with normal levels of hormones and other metabolic parameters. V-PSG confirmed the diagnosis of severe SB and suspected OSAS was ruled out. ESS score indicated mild daytime sleepiness and the patient scored five points and confirmed increased risk of Obstructive Sleep Apnea Syndrome (OSAS) in both the STOP BANG and Berlin questionnaires. The patient had several episodes of sexual activity during most sleep stages (N1, N2 and REM) which were preceded by a bruxism episode with EEG arousal lasting for a few seconds. The patient was referred for treatment including manual therapy jaw massages and an occlusal splint for the lower teeth arch to relax the masticatory muscles and decrease the number of SB/AW episodes, but he refused.

The patient was discharged home with a recommendation to follow-up with a physician and dentist for further management and support.

Final Diagnosis

1. Severe sleep and awake bruxism
2. Mild daytime sleepiness

Condition on Discharge

Stable, with recommendations for long-term care with respect to his condition and follow-up with healthcare providers.

 patient has to be hospitalized with acute acute and subac