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 presented with symptoms of shortness of breath, cough, weakness, lightheadedness, acrocyanosis, jaundice, and darkening of urine. Physical examination revealed mucosal pallor, acrocyanosis, and icterus of the facial skin. The chest x-ray showed an enlarged cardiac silhouette, perihilar vascular fullness, and bilateral interstitial prominence likely indicative of pulmonary vascular congestion. The cardiac echocardiogram revealed an ejection fraction of 60-65% with mild left ventricular wall thickness and grade I diastolic dysfunction. The patient was positive for SARS-CoV-2 but negative for influenza A, influenza B, and respiratory syncytial virus.

Treatment:

The patient received two units of crossmatch least incompatible warmed blood on day one and one unit of the same on day two of admission to treat the symptomatic anemia. The SARS-CoV-2 pneumonia was treated with oral remdesivir for five days and intravenous dexamethasone 6 mg for seven days. The patient was given intravenous 40 mg furosemide for pulmonary congestion, and empiric ceftriaxone and azithromycin for pneumonia for three days. Post-transfusions, the patient’s day-three hemoglobin was 10.2 g/dL which stabilized at her baseline of 7-8 g/dL by discharge.

Follow-up:

The patient required readmission to a cancer institute two days post-discharge where she was hospitalized for eight days, requiring five units of packed red blood cells and 60 mg of methylprednisolone IV daily. Her hemoglobin level improved to 9.2 g/dl and remained stable prior to discharge. On evaluation by an oncologist, weekly treatment with rituximab was recommended post-discharge for four weeks. On discharge, she was prescribed prednisone 40 mg for seven days followed by a taper to 20 mg for another seven days and a follow-up appointment with oncology. The patient is recommended to be discharged to a sub-acute rehabilitation center.

A few weeks later, we did a complete assessment on