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]
Patient ID: [redacted]

Admission Date: [redacted] Discharge Date: [redacted]

Hospital: [redacted] Department: [redacted]

Diagnosis:

The patient was diagnosed with low differentiated squamous cell carcinomas in the upper left lung.

Medical History:

The patient had undergone a left upper lung sleeve resection in June 2015 and had endured five rounds of chemotherapy from 28 June 2015 to 30 September 2015. In early January 2017, she developed symptoms of fatigue, consciousness disorder, and limb twitching without any obvious cause. In 6 February 2017, she underwent a Brain Magnetic Resonance Imaging (MRI) examination and the result revealed that she had multiple brain metastases.

Treatment:

The experts in Radiotherapy, Neurosurgery, Oncology, Pathology, and Imaging came together to determine an optimal therapeutic schedule for the patient. The therapeutic schedule chosen was confirmed by clinical observation.

Disposition and Condition at Discharge:

The patient was not willing to undergo surgery again and continue to undergo multiple radiotherapies. 

Summary:

The patient was admitted with a left upper lung shadow and was found to have low differentiated squamous cell carcinomas. She had undergone a left upper lung sleeve resection followed by five rounds of chemotherapy, but there seemed to be no improvement after chemotherapy. She developed symptoms of fatigue, consciousness disorder, and limb twitching and was diagnosed with multiple brain metastases. The therapeutic schedule chosen for the patient was confirmed by clinical observation.
