Complex sentence: His method of radium application by capsule then sewing the radium "points" directly to the tumor was the same method used to treat Henrietta Lacks, the host of the original HeLa cells, for cervical cancer.
Split into simpler sentences: His method of radium application by capsule then sewing the radium "points" directly to the tumor. This was the same method used to treat Henrietta Lacks, the host of the original HeLa cells, for cervical cancer.