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: 
[Header]
Discharge Summary

[Patient information]
Patient Name: [Patient Name]
Medical Record Number: [MRN]
Date of Admission: [Admit Date]
Date of Discharge: [Discharge Date]
Length of Stay: [LOS]

[Hospital course summary]
The patient was admitted with a diagnosis of squamous cell carcinoma of the left maxillary gingiva and underwent an operation requiring partial maxillectomy. Two years post-operation, three dental implants were placed, two in the anterior maxillary region, and one into the right side zygomatic bone. After six months, second stage surgery was performed, though one dental implant in the anterior maxillary region required removal because of failure to integrate with the bone. Afterwards, there was stability in implants and prosthesis functional loading for 1 year and 6 months.

[Condition at discharge]
At the time of discharge, the patient showed stability in dental implants, and the prosthesis was functioning well without any sign of pain or discomfort.

[Treatment and procedures]
The patient underwent partial maxillectomy and three dental implants (two in the anterior maxillary region and one in the right zygomatic bone). Second stage surgery was performed, and one dental implant in the anterior maxillary region was removed due to loss of osseointegration.

[Follow-up appointments]
Outpatient follow-up is recommended to monitor any changes to the stability of the dental implants. Regular follow-up appointments with the patient's dentist and oncologist are also recommended. 

[Instructions]
The patient is to follow a recommended oral hygiene routine and continue to maintain a healthy diet.

[Discharge medications]
None specified.

[Signatures]
Attending physician: [Physician Name]
Date: [Discharge Date]

 it was a non-complicated surgery. A second