First Conference by Santiago Castellanos, an international guest of the Psychoanalysis & Medicine day of the Institute of Psychoanalysis of Bahia and the EBP-Bahi Section, which took place on October 21st, 2017 in Salvador da Bahia, Brazil. The theme of the first conference of S. Castellanos was entitled "Body Pain: What Body is it?". Radio Lacan offers the conference to its audience, and thanks to Celia Salles and Marcelo Veras for the authorization to transmit and the commitment of the recording.