Essential TNM: Evaluation of a Training Exercise in Sub-Saharan Africa.

: Information on cancer stage at diagnosis is largely missing or poorly documented among population-based cancer registries in sub-Saharan Africa (SSA). In an early field trial of Essential TNM staging, it was observed that some training was needed to enable cancer registrars to abstract the correct TNM from case records. In November 2018, the Addis Ababa City Cancer Registry hosted a training course attended by 17 participants from 16 cancer registries in SSA. The participants were asked to stage 16 cancer cases (from anonymized photocopies of case records obtained from the Global Initiative for Cancer Registry Development) before and after the training. The discrepancy of the stages from before and after were scored and compared. Results showed that there was a substantial improvement in the participants' performance after the training. The application of the Essential TNM staging system, with training in its use, would allow cancer registrars in SSA to abstract cancer stage at diagnosis in a clinically recognized format, which is crucial for cancer control and public health care policy making.