Lantheus Holdings, of North Billerica, Mass., has entered a deal to acquire New York-based Progenics Pharmaceuticals Inc., which develops medicines and other technologies to target and treat cancer. "This transaction leverages our core capabilities, including proven commercial and operational expertise while diversifying our revenue stream by broadening our presence in emerging uses of radioisotopes in precision diagnostics as well as the exciting field of radiopharmaceuticals in oncology treatment," Lantheus President and CEO Mary Anne Heino said on a call related to the deal.