A Start-Up Claimed Its Device Could Cure Cancer. Then Patients Began Dying.
January 23, 2025

(DNYUZ) – ExThera, which has about 50 employees, makes a single product: a filter that it says can be used to remove the tumor cells that circulate in patients’ blood and enable cancer to metastasize. Early last year, the company sold thousands of the devices to Mr. Quasha’s private equity firm, Quadrant Management, which began using them on late-stage cancer patients at a small clinic in Antigua.
Quadrant, which invests on behalf of Mr. Quasha and his family and doesn’t have outside investors, charged $45,000 for each course of treatment and advised patients to return to the clinic for regular sessions. It also urged them to abstain from chemotherapy between treatments. (Read More)