A new complaint from a former patient has come to light regarding the clinic on Karneadou Street in Kolonaki, where Giorgos Mazonakis lost his life on September 9 during a plasmapheresis session. The woman, who spoke to MEGA, claims she was offered stem cell therapy twice a month for five months and describes a cost of “approximately €5,500 each time.” She also alleges that no medical tests were requested before the procedure began, and that she felt severe discomfort during the treatment.
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Giorgos Mazonakis: The new complaint about the Karneadou clinic
The woman stated that she visited the clinic in early February 2026. She had previously undergone surgery and other treatments and, as she described, was looking for a way to regain her strength. “He told me that due to my illness I generally looked worn out. He suggested we do a stem cell treatment and said I would need to undergo this therapy twice a month for a period of five months — meaning I would have to go there about 10 times — combined with certain supplements that cost around €230. When he told me that amount for the supplements I was a little hesitant, because it was pushing the total up. About €5,500 each time.” According to her complaint, before the procedure began the doctor did not ask her to undergo any medical tests. She described remaining at the clinic for several hours and said that during the treatment she experienced nausea, causing the procedure to be temporarily halted.
“My hands were in a lot of pain”
“I remember walking into the clinic on a Tuesday morning and leaving several hours later. While I was there I started feeling nauseous and we stopped for ten minutes. I finished the treatment, but my hands were in a lot of pain and the nausea continued. He told me to go pick up the supplements, but I told him I was already taking some medication for anaemia and didn’t want to mix them. He said, ‘What I’m giving you — you’ll see a big improvement, and they’ll help with the anaemia too.'” These new complaints about the Karneadou clinic are coming to light as the investigation into the circumstances of Giorgos Mazonakis’s death continues. The two doctors charged in connection with his death were remanded in custody following their testimonies and have been held at Korydallos Prison since the morning of Thursday, September 17.
A second testimony: cryolipolysis treatment gone wrong
A second woman also spoke to MEGA, with her complaint relating to a different case involving a cryolipolysis treatment. As she described: “I ended up there on the recommendation of another doctor, to get rid of excess weight. I underwent cryolipolysis treatment — my body was placed in a machine — and afterwards the treatment failed and the abdominal area became deformed. I developed a metabolism problem because I can no longer lose weight.” In the context of the broader discussion surrounding complaints about medical practices, the older case of 40-year-old lyricist Ifigenia Giannopoulou was also revisited. She died in June 2004 following a visit to an endocrinologist’s clinic.
Her brother had stated: “He administered a drug for rheumatoid arthritis — an expensive injection, he had said it cost €1,000 at the time. Ifigenia began vomiting. The forensic findings, however, tell us that as soon as the drug was administered and began circulating throughout her body, it destroyed her organs wherever it passed. He did not accompany her in the ambulance, and then he vanished — closing down the clinic and making the records disappear,” her brother said. The investigation into the Karneadou clinic and the circumstances surrounding the death of Giorgos Mazonakis remains ongoing, as new testimonies from former patients continue to emerge.
