The global healthcare system faces an unprecedented challenge as cancer cases surge worldwide while the workforce needed to diagnose and treat them fails to keep pace. This disparity threatens to create a two-tiered cancer care system where geography determines survival odds more than biology. The Lancet Oncology Commission's comprehensive workforce modeling reveals that one-third of cancers globally go undiagnosed, with over 60% remaining undetected across parts of Africa. This diagnostic gap, combined with inadequate treatment infrastructure, contributes to stark survival disparities between regions. The commission's projections show Africa maintaining a mere 34% five-year survival rate by 2050, compared to over 60% in high-income nations. The workforce deficit extends beyond physicians to encompass critical support roles, with nursing shortages representing the largest component at 65 million unfilled positions globally by mid-century. Diagnostic specialists in radiology and pathology face particularly severe shortages of 16 million positions, creating bottlenecks in early detection and accurate staging. These findings underscore a fundamental challenge in global health equity: while cancer treatment advances rapidly in well-resourced settings, the human capital needed to deliver these interventions lags dramatically in regions experiencing the fastest cancer burden growth. The commission's work provides crucial baseline data for workforce planning but highlights how demographic shifts and changing risk factors in low- and middle-income countries are outpacing healthcare system capacity. Without coordinated international action on training, retention, and resource allocation, cancer care disparities will likely worsen despite therapeutic advances.