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: 
Hospital Course:
The patient, a 42-year-old male, was admitted to the respiratory service for management of chronic upper airway papillomatosis. The disease extended to involve his upper trachea, resulting in marked symptoms such as constant shortness of breath, cough, wheeze, hoarse voice, and reduced exercise tolerance. The patient had a current 22 pack-year smoking history, with no other comorbid medical conditions. The patient had a history of 166 exacerbations requiring intervention for regrowth of polyps and had previously been treated with numerous multiple laser ablation procedures via micro laryngoscopy and flexible bronchoscopy. Fibre-optic bronchoscopy was performed to remove the papillomas via pulsed argon plasma coagulation (APC), followed by an injection of intralesional cidofovir via a Wary Transbronchial histology needle. The patient has had this regimen done twice before, and on follow-up procedure at 18 months, only 20% of his trachea was affected. At the next follow-up period, a 1.9 mm cryoprobe of effect 2 was used to remove the papillomas, followed by an intralesional cidofovir injection. At this follow up, <20% of his trachea was found affected. Previous exacerbations were occurring with a frequency of 4×/12 months (2013), 7×/12 months (2014) and 5×/12 months (2015). 

Summary:
The patient had chronic upper airway papillomatosis which extended to involve his upper trachea, resulting in marked symptoms. The patient was successfully managed with fibre-optic bronchoscopy, followed by an injection of intralesional cidofovir via a Wary Transbronchial histology needle. On follow-up, the procedure was repeated, and the patient's symptoms improved significantly. Previous exacerbations were occurring frequently, but this regimen resulted in a decrease in the frequency and severity of exacerbations.

 tomography. The patient had a history of multiple lung