Radiation oncology firm Sirtex Medical has introduced a new way to deliver yttrium-90 (Y-90) for metastatic colorectal cancer radiation therapy.
The program, called SIR-Spheres FLEXdose Select, makes SIR-Spheres Y-90 vials available at 3 mL; the vials contain a microsphere volume of 27 million compared with 44 million in the company's current 5 mL vials.
The new option is intended to give users "more selective treatment targeting," the company said.
![A 53-year-old patient (patient number four) with a recurrent pituitary adenoma with extension of a cystic component of disease to the medial temporal lobe apparent on MRI (contoured in blue), and extension of disease to the left sphenoid bone and orbital apex apparent on [68Ga]Ga-DOTA-TATE (contoured in yellow).](https://img.auntminnie.com/mindful/smg/workspaces/default/uploads/2026/04/pituitary-tumor.QGsEnyB4bU.jpg?auto=format%2Ccompress&dpr=2&fit=crop&h=167&q=70&w=250)
