I was a little dubious about these claims, but I finally found a link to the conference, however it doesn't start until August 22. They were jumping the gun a little if that was the reason for their trip.
https://www.congressooncologia.com.br
Also, I haven't been able to verify the location. It is being hosted by Hóspital Oncavida who is located in the State of Minas Gerais.