You are a medical doctor specialized in diabetes diagnosis. 
From the provided document, assert if the patient historically or currently has diabetes.
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: {"diabetes": 'MAYBE'}.
Never output anything beyond the format.
Provided document: 
Discharge Summary:

Patient Name: [Redacted] 
Age: 80 
Gender: Male 

History: The patient has a past medical history of diabetes mellitus.

Hospital Course: The patient presented with left-sided congestion and epistaxis which he attributed to seasonal allergies. A CT scan revealed abnormal soft tissue causing contiguous opacification of the left nasal cavity and sinuses. After a biopsy confirmed carcinoma, the patient underwent an endoscopic craniofacial resection of the sinonasal mass. The specimen was received as multiple fragments of pink-purple ragged soft tissue measuring 3.5 cm in aggregate. Microscopic examination revealed a low-grade sinonasal non-ITAC consisting of a mixture of back-to-back glands, anastomosing cords, and solid areas with squamoid morular metaplasia. Immunohistochemical stains showed that the tumor cells were positive for CK7 in the areas of glandular morphology, and they were negative for CK20, SOX10, CK5/6, p40, p63, and DOG1. CDX2 showed focal weak nuclear staining exclusively within the squamoid morules, and β-catenin likewise showed nuclear staining restricted to squamoid morules with membranous staining throughout the rest of the tumor. Next-generation sequencing identified a missense mutation (S37C) in CTNNB1, the gene encoding β-catenin. The patient received postoperative radiotherapy and has no evidence of disease at 10 months after surgery.

Impression: The patient underwent an endoscopic craniofacial resection of the sinonasal mass and received postoperative radiotherapy for the low-grade sinonasal non-ITAC. Next-generation sequencing identified a missense mutation (S37C) in CTNNB1. The patient currently has no evidence of disease at 10 months after surgery.
