Breakthroughs in our global fight against cancer have been achieved. However, this progress has been unequal. In low- and middle-income countries and for specific populations in high-income settings, many of these advancements are but an aspiration and hope for the future. This review will focus on health disparities in cancer within and across countries, drawing from examples in Kenya, Brazil, and the United States. Placed in context with these examples, the authors also draw basic recommendations from several initiatives and groups that are working on the issue of global cancer disparities, including the US Institute of Medicine, the Global Task Force on Expanded Access to Cancer Care and Control in Developing Countries, and the Union for International Cancer Control. From increasing initiatives in basic resources in low-income countries to rapid learning systems in high-income countries, the authors argue that beyond ethics and equity issues, it makes economic sense to invest in global cancer control, especially in low- and middle-income countries.

Fueled by HIV, sub-Saharan Africa has the highest incidence of Kaposi's sarcoma (KS) in the world. Despite this, KS diagnosis in the region is based mostly on clinical grounds. Where biopsy is available, it has traditionally been excisional and performed by surgeons, resulting in multiple appointments, follow-up visits for suture removal, and substantial costs. We hypothesized that a simpler approach - skin punch biopsy - would make histologic diagnosis more accessible. To address this, we provided training and equipment for skin punch biopsy of suspected KS to three HIV clinics in East Africa. The procedure consisted of local anesthesia followed by a disposable cylindrical punch blade to obtain specimens. Hemostasis is facilitated by Gelfoam®. Patients removed the dressing after 4 days. From 2007 to 2013, 2,799 biopsies were performed. Although originally targeted to be used by physicians, biopsies were performed predominantly by nurses (62%), followed by physicians (15%), clinical officers (12%) and technicians (11%). There were no reports of recurrent bleeding or infection. After minimal training and provision of inexpensive equipment (USD 3.06 per biopsy), HIV clinics in East Africa can integrate same-day skin punch biopsy for suspected KS. Task shifting from physician to non-physician greatly increases access. Skin punch biopsy should be part of any HIV clinic's essential procedures. This example of task shifting may also be applicable to the diagnosis of other cancers (e.g., breast) in resource-limited settings.

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