Updates from the hearing here.

DETROIT, MI -- After nearly two years of seething resentment over the suffering of lost loved ones, the relatives of victims in the case of a disgraced cancer doctor will get their chance to confront Farid Fata in court this week.

Fata's sentencing hearing begins Monday and could go on for days.

The Oakland Township oncologist pleaded guilty in September 2014 to 13 counts of health care fraud, two money laundering counts and one count of conspiracy to pay or receive kickbacks.

He was accused of putting hundreds of people through harmful and unnecessary cancer treatments in which patients were terminal, in remission or misdiagnosed.

Prosecutors have asked U.S. District Court Judge Paul Borman for a 175-year federal prison sentence.

Fata's lawyer has asked for a 25-year sentence.

The government has also asked Borman to order the doctor to pay back $17.6 million paid by Medicare and Blue Cross/Blue Shield of Michigan for fraudulent treatments. The figure doesn't include patient co-pays coinsurance contributions, according to court documents.

"Fata's crimes were so voluminous and overwhelming that the government does not have the resources to uncover every instance of his fraud and mistreatment," an assistant U.S. attorney wrote in a sentencing memorandum.

Prosecutors count 533 identified victims.

"I was treated by Fata from February 2009 to July of 2013," wrote former patient Tim Parkin Sr. in a victim statement submitted to the court. "... After the seventh chemo treatment, I was in remission... I was given... rituxan treatments six weeks on six weeks off for two years that totaled around 52 treatments that I should have never had. They say the rituxan destroys your immune system. When I contacted the NCI they told me that no one should ever receive back to back rituxan treatments and no more than sixteen treatments in a one year period... All the hours of waiting in his office to see him for five minutes. Now my bones hurt all the time I'm sick all winter long because I can't even fight off a cold... I have problems with my hands and wrist they hurt all the time."

Other victims and family members are expected to speak ahead of Fata's sentencing this week.

Fata was charged in August 2013 after a series of FBI interviews with employees of the doctor's Michigan Hematology Oncology Centers, which had offices in Clarkston, Bloomfield Hills, Lapeer, Sterling Heights, Troy and Oak Park.

He's been kept behind bars since.

A doctor at Beaumont Hospital reported treating at least two former Fata patients after his arrest, according to court documents.

One had been diagnosed with Stage-4 lung cancer and treated with both radiation and chemotherapy. When the Beaumont doctor learned that Fata made the diagnosis after a fine needle biopsy, a full excisional biopsy was performed, showing the patient had a completely different cancer, a sarcoma, for which the surgery, not chemotherapy, was needed.

A second patient had been treated with radiation for his prostate cancer before being "inexplicably shifted to a regimen of lung cancer chemotherapy," according to court documents.

The Beaumont doctor reported that the patient underwent two to three years of unnecessary chemotherapy, leaving him "severely disabled with neuropathy, wheelchair bound, and convinced by Fata's lies that he needs chemotherapy."

The patient continues to his new doctor for chemotherapy, according to prosecutors.

The sentencing hearing is scheduled to begin Monday at 8:30 a.m.